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Author Fellows lamps forum.
royfellows

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Joined: 13/06/2007
Location: Great Wyrley near Walsall

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Posted: 03/04/2017 12:27:39
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TRAVEL INFORMATION

ALL 2 CELL POWER BANKS ARE 26 WATT HOURS (WH)

HIGH CAPACITY 4 CELL (BLUE LABEL) ARE 52

HIGH DISCHARGE 4 CELL (SAR, RED LABEL) ARE 38.5

POWER BANKS ARE ELECTRONIC DEVICES WHICH CONTAIN LITHIUM BATTERIES, THEY ARE NOT JUST "BATTERIES"

I am offering this information to help travellers, but obviously not responsible for any travel restrictions that may be in force ant any particular country.

As an aside, the WH rating for the size and weight of the power bank is a good indication of the quality of the batteries it contains. Some lamp manufacturers my be reluctant to state the WH for this reason.
Ultra high discharge, that is a safe 20 amps per cell discharge, results in a lower capacity. However to the best of my knowledge there is only my SAR lamp on the market that needs this specification of battery.

--

"How people get on with these things as a mobile device I cannot begin to imagine, but it certainly explains a lot about peoples behaviour."
IP: 88.108.20.52
royfellows

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Posted: 11/04/2017 10:00:27
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Due to holidays and other commitments I am unable to take any new orders until further notice.

Please pass this around.

--

"How people get on with these things as a mobile device I cannot begin to imagine, but it certainly explains a lot about peoples behaviour."
IP: 88.108.20.52
royfellows

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Posted: 07/06/2017 12:12:26
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If someone on here has sent an X2000 in, can you please let me know who you are etc, no advice note or anything. Cant see anything wrong with it except a bit of moisture got in somehow.

I am now fitting better cable glands rated at IP68 and with cable protection, so it will get upgraded anyway.

Also, back orders etc filled and back to normal with most lamps in stock.

--

"How people get on with these things as a mobile device I cannot begin to imagine, but it certainly explains a lot about peoples behaviour."
IP: 88.108.18.26
royfellows

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Posted: 06/08/2017 11:13:33
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2 cell power banks.

There has been a design change to move to all aluminium cases, as shown below.



(click image to open full size image in new window)

These are inherently stronger than the plastic ones, price is unchanged.

Other changes
The all popular X2000 now has daylight matched colour temperature XP-L emitters which also give more output.

The new cable gland is universal to lamps and power packs, as it is a much improved component and also is IP68 rated.

Some issues with other power banks.

Issues have come to light regarding failure of inner strands on power banks of the earlier type with metal cable glands.

Batteries affected have soft rubber cable (not PVC) and metal gland.

The issue arises where the cable is under some tension and is a product of the fitment to the helmet. Many have now been in use for several years without issue.
I am accepting returns on failed items and turning them around as soon as possible with upgraded gland.

--

"How people get on with these things as a mobile device I cannot begin to imagine, but it certainly explains a lot about peoples behaviour."
IP: 88.105.106.76 Edited: 06/08/2017 11:17:46 by royfellows
sinker

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Posted: 06/08/2017 11:19:43
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Very tidy. Any thoughts on an upgraded battery mount?

--

Ah, well, now, you see.... IP: 109.157.53.106
royfellows

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Posted: 06/08/2017 11:37:28
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sinker wrote:


Very tidy. Any thoughts on an upgraded battery mount?


If you mean the shockcord I doubt this will be changed as its effective and adds no bulk in the way that some kind of fancy mount would do.
A bit funny, another 'manufacturer' that I will not name does not supply any kind of mounting and 2 people asked me to mount their batteries for them in this way.

The technology is very much in a state of flux at the moment with new battery technology being developed, any kind of investment in current state of play would be a folly.

--

"How people get on with these things as a mobile device I cannot begin to imagine, but it certainly explains a lot about peoples behaviour."
IP: 88.105.106.76
royfellows

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Posted: 27/10/2017 17:34:27
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The Lynx X_12

This is not only the latest version of what I believe to be the world’s most powerful commercially available caplamp, but sets a new standard in efficiency in underground lighting.

The MagnumStar was the first lamp to put over 1000 lumens on someone’s head that was commercially available, albeit at a rather heavy weight. The last versions of this lamp used 3 series emitter arrays with an input voltage of approximately 12V. This was by far the best version of the lamp, however they dependant on a belt mount battery to support this voltage with a respectable burn time.
When I moved up to aluminium lamps the bi metal aluminium and copper construction proved to be a milestone in thermal conductivity and formed the basis of the first Lynx. The X12 possibly represents the culmination of the last few years of experimentation and development, and also takes advantage of the latest in Lithium Ion battery technology. It is also a ‘lamp system’ as it will be available with a choice of different power pack types and other accessories to be announced later.



(click image to open full size image in new window)

I have changed from naming lamps after output as the basic design of each lamp varies little.

The lamp gets its name from the fact that it uses a 12 volt cell configuration, actually 11.2 volts nominal. It’s my belief that this now represents the optimum in practical efficiency in a caplamp.
There is in my view a maximum practical size for a lamp, and also a practical minimum for a reflector or optic configuration that will generate a good beam pattern. Matching series wired LEDs to the input voltage is fairly engraved in stone with me, and so sets of 3 present the optimum equation. LEDs are at their most efficient at low drive currents, so 3 LEDs at low current is a lot better than say 1 at a higher current. I have dropped a naming convention based on output in favour of the one based on the voltage as I doubt that the basic design of this lamp will change, it’s too good.

The lamp described below is the flagship of a new series of lamps using the 12V design model. The driving force behind these is new lithium ion technology which enables higher capacity and discharge rates from just slightly larger cells. The result of this an amazing amount of punch and burn time from a small lightweight helmet mount battery pack containing 3 series array of cells.
Initial testing was on small battery pack of 3 ultra high discharge 18650 cells. The incentive was the long burn times that I was getting on my SAR with its 4 cell 5.2 AH pack, and the realisation that I had more than enough for the longest trips.

A three series array of cells also has a wider discharge band. A single cell is from 2.6V to 4.2V fresh off charge. A 2 series has twice this and a 3 series has three times this.
The lamp is the same in concept to the SAR2, both using the same headset and beaten copper LED mounting, backplate, switch configuration, and rear heatsink. However it replaces both the previous X6000 and the SAR due to the fact that with new battery technology its possible to run it at full power from a small 3 cell helmet mount power bank utilising the latest Sanyo 20700 Li Ion cells rated at over 4250 mAh, and also capable of high discharge.
This new high end model uses higher output Cree XP-L emitters in a smaller and lighter body of 260 grams than its X6000 predecessor. Also with the more user friendly repositioned switches and heatsinking recessed into the rear of the lamp.
The internal configuration of the lamp of 3 series beam and flood emitters is similar to the previous X6000 except for the higher output XP-L emitters behind smaller reflectors, and the central emitter being mounted right at the back of the lamp behind high spot reflector extending right to the front and exactly level with the smaller outside ones. Because of this the feature is not very noticeable and can only be spotted by careful examination. It should be noted that the heat generated by the spot beam will conduct directly to the rear heatsink which gives the lamp a more even heat dissipation.
This configuration also provides a particularly ‘crisp’ lighting effect which I find a joy.
The flood emitters are spaced as far apart as possible to avoid the situation of mutual heat feed, one or another
The whole planning of the LED configuration is to give an extremely powerful overall and even lighting effect which will light up the largest underground spaces in a spectacular manner. The full power performance is awesome, everything on at the same time outputs a massive 7050 lumens at 25 C with the rear heasink fins giving a better heat dissipation than its predecessor. The standard beam mode as I call it gives about 300 lumens, I can supply with a different setting if requested.
Most memorable test was at Whiskey Bottle Corner in the Rampgill Mine up at Nenthead where the whole place was lit up like Tesco.
The twin pilots of the X6000 are now replaced by a single pilot albeit driven at an increased 250 mA. The emitter is an XP-G 2 and outputs 126 lumens. It is driven by a high efficiency switch mode driver that handles the high input voltage overhead admirably running at an average of 80% efficiency and at nominal voltage of 11.1 volts hitting the battery for 80 mA.
An advantage of this design is the fact that it is capable of running at full output throughout the discharge range of the batteries, right down to the cut off point of 7.5V. This means that in an emergency it would power the lamp for three to four days from the helmet power pack.
It can also be combined with the low level flood to give a very nice overall lighting effect, battery hit about the same as standard beam.
The burn time from the optional 14 AH belt mount battery is approximately 7 days. The original Oldham miners lamp outputted 50 lumens for 12 to 16 hours from a battery that weighed about 5 LBS in old money. The later L16 about 90 lumens from a Li Ion battery that was much lighter but still needed mounting on a belt. The whole thing reminds me of the evolution of 19th Century warships, where ships were obsolete by the time they came to be launched, we are really in the same boat, pun unintentional, with modern technology.
The rear mounted switches are the more user friendly configuration same as the SAR 2 and it shares the same rear external heasinking which gives improved heat dissipation over and above that of the previous X6000.
The battery meter is switch activated same as the previous X6000 however the meter itself is behind the led module and can be read through a row of 4 holes same as the SAR2.
Although photographs of the lamp in use underground show no difference to the SAR2 which actually outputs more beam power, the increased and ‘crisper’ output is very noticeable to my eye; this has to be partially attributable to the high spot beam. Also I have selected high colour temperature ‘daylight’ quality emitters which again, to my eye, are better.
The SAR2 is a really good lamp but very finicky to produce, so this model is now reluctantly been discontinued.
With the new lamp comes a new range of 12V battery choices, the ones below are suitable for this lamp, others will be available for a new lower output lamp under development.

The 4.25 AH Helmet pack
This power pack will give about 20 hours light on beam standard mode. It utilises the latest Sanyo 4250 mAh 20700 Li Ion cells rated safe at up to 15 amps, but is electronically governed to 8 amps. The actual capacity is 4000 mAh, hence the quoted burn time.

This power bank will recharge to about 80% of its total capacity in less than an hour!!!!
So out of one cave or mine to the car, recharge while you have a coffee and bite to eat, then back underground with an almost replenished power bank.

Higher capacity versions of the same will be used as soon as Tesla 2170 cells become available, these will be 6 AH and probably expensive.

Below, 2600 mAh version (scorpion) on the left, the one suitable for this lamp on the right.



(click image to open full size image in new window)

The 14 AH Belt Mount Power Pack
This is a completely new design and replaces the previous blue PVC cased adapted Oldham MF casing based one and supports easily the lamps maximum output of over 7000 lumens.

It is of sturdy aluminium with a reinforced cable gland and is rated at IP 68, immersible for up to 5 metres for 1 hour. Being belt mounted it will of course be subjected for longer periods of immersion but at shallower depth.
It is also radically different in that it can be readily opened up so that the 3 serial battery packs can have their cells replaced if and when desirable. It is the first power bank I have designed that has removable cells and I may well be producing helmet mount ones in the future.
It is supplied with 12 Sanyo 3500 mAh cells, I cannot see anyone running this flat! It is rated at 14 AH at 11.1 volts.

As the cells are sealed inside a waterproof metal container there is a pressure relief valve fitted which vents at about 5 psi. Lithium Ion cells under extreme circumstances can experience a phenomena known as thermal runaway and vent gas.

I have to say in honesty though that I would not recommend this for the lamp over the helmet pack.

Charging

The slightly complicated balance chargers of the old blue belt battery have gone, replaced by a simple mains adaptor charger, red – green LED. Charge level can be read by connecting it to the lamp and reading the blue LED fuel gauge. Total recharge of the helmet pack is done in about a couple of hours.
Cost
The cost of the lamp together with the 4.25 AH power bank and charger is £325, same as the SAR2.

The next lamp
The next lamp in the new series, the ‘Scorpion’ is currently under development. With this I will be aiming to meet the higher IP68 immersion standard in a small lightweight lamp capable of high output. It is very innovative and nothing like anything I have produced before. A square design rather than round and GoPro mounted and compatible, what I can tell you is that it basically looks like an aluminium GoPro Hero with heat fins. I don’t know how this grabs you.


--

I wonder about the abandoned flip flops, but how does baling twine get into MY mine?
IP: 92.24.23.178 Edited: 27/10/2017 17:55:20 by royfellows
ChrisJC

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Posted: 27/10/2017 21:19:30
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I look forward to bumping into you in the darkest reaches of a mine sometime. Maybe NAMHO next year.

Chris.
IP: 94.126.234.198
royfellows

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Posted: 27/10/2017 21:22:39
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I think you still in the lead Chris, and will be for many years to come.

--

I wonder about the abandoned flip flops, but how does baling twine get into MY mine?
IP: 92.24.23.178
ant89

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Posted: 29/10/2017 18:58:14
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If the Scorpion uses a gopro mount does this mean your expanding your lamps into other activities? Cycling for example. IP: 84.93.184.200
royfellows

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Posted: 30/10/2017 10:32:03
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The main idea is to use GoPro mount as a convenience as I can see GoPro eventually becoming a universal standard. As well as this people will want to mount a camera alongside, a comprehensive accessory kit will be part of the package.
Cycle mount will obviously be an option.

It will be a long time before its on offer as I am still playing around with it, but if demand justifies it, it could form the basis for a new range including a cheap 'club' version.

--

I wonder about the abandoned flip flops, but how does baling twine get into MY mine?
IP: 92.24.23.178
Digit

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Posted: 30/10/2017 10:46:06
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ant89 wrote:

If the Scorpion uses a gopro mount does this mean your expanding your lamps into other activities? Cycling for example.


Roy, please do not expand your activities into the cycle market. Twice in the recent past whilst driving on narrow roads in the West Midlands area I have been completely blinded by cyclists wearing head mounted lamps. On both occasions I have had to brake hard and hope that I succeded in staying on the road. (Serious and honest grumble - but not with you.)

If you feel any need to expand please consider looking at the film industry I am sick of watching recently made films set either in the present or future where characters are using lamps/torches with the output of a starved glow worm. ('Light' hearted suggestion.)

--

~~~ The future is not what it used to be ~~~
IP: 92.3.15.12
royfellows

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Posted: 30/10/2017 10:55:19
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The trouble is that one has no control over the use that a purchaser will put things to other than the intended purpose.

There are some good videos being made now, my favourite is the Cwmystwyth rescue.

https://www.youtube.com/watch?v=_xduEyXTdgc

--

I wonder about the abandoned flip flops, but how does baling twine get into MY mine?
IP: 92.24.23.178
ttxela

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Posted: 30/10/2017 14:29:54
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I have on occasion mounted my MagnumStar on my bike Blush

It was fixed to the bike and not my head though and was positioned so as not to dazzle oncoming traffic - although it was used on the cycleway I ride to work which at the time was unlit exposing the woeful inadequacy of the bike lights I had at the time which were only really fit for indicating your presence to other traffic in a suburban streetlit setting.

Not necessary now as the kind chaps at the council have fitted solar powered lamps set into the tarmac of the cycleway and my ebike light is plenty bright enough for navigating by in total darkness.
IP: 188.39.178.242
Praada

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Posted: 30/10/2017 15:15:33
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Roy, could you help me source a new headlamp that will fit an elastic head band? How do yours compare in price and brightness against the Lenser XEO19 which i am told is one of the best on the market but costs like £275!

I want the brightest available which will see me through a day of exploring without needing a power inverter in the car to recharge between destinations.

I'd be interested in a comparison of your brightest lamp vs the lenser also the cost of your best lamp Smile

--

"I got enough batteries to live down here indefinitely!"
IP: 87.224.25.210
royfellows

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Posted: 30/10/2017 15:42:13
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Praada wrote:

Roy, could you help me source a new headlamp that will fit an elastic head band? How do yours compare in price and brightness against the Lenser XEO19 which i am told is one of the best on the market but costs like £275!

I want the brightest available which will see me through a day of exploring without needing a power inverter in the car to recharge between destinations.

I'd be interested in a comparison of your brightest lamp vs the lenser also the cost of your best lamp Smile


Thanks for your interest but I no clue about the Lenser and never even seen one.
Best I can advise is to browse the website at www.ledcaplamps.com and see what takes your fancy.

Best brightness info I can give is that 1000 lumens is about the same as the old filament 100 watt electric light bulb or modern car headlamp.

--

.................whole weekend and a bad back, but that life.
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Praada

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Posted: 30/10/2017 15:45:09
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The Lenser claims 2000lumens and 300m visibility, which i find extremely hard to believe and don't really fancy spending £275 to test it Roll Eyes I will look at that web link and be in touch Smile Certainly due a upgrade now that my princeton has aged and got battered about for the last year.

--

"I got enough batteries to live down here indefinitely!"
IP: 87.224.25.210
royfellows

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Posted: 30/10/2017 17:12:20
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Just looked up the Lenser on the web, IPX6, not good enough, IP67 is minimum for the underground, total immersion at 1 metre for about half an hour.

Claimed output is possible from 2 LEDs but depend on LED type and max drive current. I dont like any product where there is a lack of technical specs, they dont even give the battery capacity.
You want facts and figures not "good", brilliant, "a long time" etc. Reminds me of another seller I wont mention.

--

.................whole weekend and a bad back, but that life.
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Praada

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Posted: 31/10/2017 09:16:19
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Roy, i have looked on your website, i am interested in knowing the difference between the dragon and the lynx models, which will give me the most light for the longest duration? Dependent on this, i am in the market for one and have the money waiting on your recommendation Smile I trust your judgement, for the record my helmet is a Petzl Elios with the strap clips no bracket mounting available, however i don't mind retrofitting one if it doesn't affect the impact strength.

Thanks in advance.

--

"I got enough batteries to live down here indefinitely!"
IP: 87.224.25.210
Mr Mike

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Posted: 31/10/2017 09:31:32
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Re the Lenser, its 4 x 18650 @ 7.4V, 38.48 Wh found the full details on:

https://www.ledlenser.com/uk/uk/products/head-torches/xeo-series/xeo19r/

You need to click on the Tech Details icon.

--

Mr Mike www.mineexplorer.org.uk
IP: 92.4.65.84
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