The new best headlight

[Gubbins]

this is the leds in them.
http://www.cree.com/LED-Components-and-Modules/Products/XLamp/Discrete-Directional/XLamp-XML

but as you can see the driver in the light will not match those specs for the leds lm output quoted in the spec.

because if it did it would get so hot so fast and just go bang as thats 6a at 20w for two of them.

you can have my light when my new one turns up

Thanks for the offer. What is it exactly? I will buy it from you if it's what I want.. although you would do better keeping it as a spare
. Just in case your new one either pops or doesn't work as expected.

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[soundwave]

http://www.ebay.co.uk/itm/Solarstorm-X3-CREE-U2-6600Lm-Mountain-Cycle-Bicycle-Light-Bike-Front-Lamp-Torch-/262101267942?hash=item3d0673f5e6:g:obEAAOSwz2lXBYPN

 

[Gubbins]

http://www.ebay.co.uk/itm/Solarstorm-X3-CREE-U2-6600Lm-Mountain-Cycle-Bicycle-Light-Bike-Front-Lamp-Torch-/262101267942?hash=item3d0673f5e6:g:obEAAOSwz2lXBYPN

I had looked at one of those but had decided on a two led light to make the battery go a bit longer. I have the original battery and a new one will come with another battery giving me a spare..
Was looking at this one which I can get next day on prime.
https://www.amazon.co.uk/gp/aw/d/B01HHNBPYW/ref=mp_s_a_1_3?ie=UTF8&qid=1475791001&sr=8-3&pi=SY200_QL40&keywords=cree+bike+lights&dpPl=1&dpID=51GZcPdyztL&ref=plSrch

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[soundwave]

there all the same tbh led wise you just get more of them the difference is in the batts and how long they will last.

more power more light
http://www.ebay.co.uk/itm/CREE-CXB3590-COB-LED-3500K-CD-80-CRI-Fast-shipping-from-US-seller/112108594809?_trksid=p2047675.c100011.m1850&_trkparms=aid=222007&algo=SIC.MBE&ao=1&asc=39272&meid=24d7f3b145424fa1997f5b8836621143&pid=100011&rk=1&rkt=18&sd=152241212113

 

[soundwave]

light came today

max power

half power

strobe


so it has 11 10w leds in it but its no where near stated light output for the power its drawing from the batt.

 

[Gubbins]

What does that mean? The Chinese are lying about it like with the cells!

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[soundwave]

there is no way this light is 28000 lm its not pulling no where near enough power.

my old light used 1.2a on max and this one is 2.3a on max with 8 more leds in it lol

it is brighter but not buy much id say but will test it when its dark and see how it throws the light out

 

[Deleted member 4366]

If you look at the voltage, it's sagging drastically at full power. I think you need to get some decent cells. They shouldn't sag much at only 2.3A. 6.2v means 25% sag!

If the LEDs are T6s, I would have expected at least 10 amps at full power. It could be that the cells have maxed out on their ability to provide current.

 

[danielrlee]

Even if comparing the best and worst LEDs on the market, efficiency doesn't vary that much between them, so power consumption is a reasonable indication of light output. At around 16W power consumption, that is majorly disappointing. Just goes to show that more isn't always better.

 

[soundwave]

there Panasonic 3400ma
http://www.bga-reworking.co.uk/e-bike-batteries/panasonic-ncr18650b-3400mah-li-ion-battery-flat-top-unprotected.html

there down to 4.13v tho so will give them a charge.

 

[danielrlee]

there Panasonic 3400ma
http://www.bga-reworking.co.uk/e-bike-batteries/panasonic-ncr18650b-3400mah-li-ion-battery-flat-top-unprotected.html

there down to 4.13v tho so will give them a charge.

4.13V is a little over 90% full, so it won't make much difference.

 

[soundwave]

that meter can be out by 2% tho but tbh doubt it will make much difference.

its like buying a bag of crack and finding out its mostly flour

 

[Deleted member 4366]

There's a two things that don't add up. Firstly, the sag should only be about 0.3v at that current. Secondly, we know that a single T6 takes about 1A, so 11 should take 11A. The wires between the battery and light would melt at 10 amps. They look good for about 3 amps. It could be their resistance that is cutting down the voltage and preventing the current. Can you get a voltage reading directly on the battery pack while it's under load?

Also, try plugging in the light directly to the battery to see if it goes brighter.

 

[soundwave]

you mean like this

 

[Deleted member 4366]

The light needs to be on with full power while you measure the battery voltage at the battery.

Do the simple things first: Just plug the light in directly to the battery without the meter, switch, extra wire and whatever else you have to see if it goes brighter.

 

[soundwave]

the light is no brighter from the pack direct.

 

[soundwave]

full

half

old light full

 

[Deleted member 4366]

That looks like knackered cells!

 

[soundwave]

cant see how as i have never ran them all the way down?

i got them from here.
http://www.ebay.co.uk/itm/191955071986?_trksid=p2060353.m2749.l2649&ssPageName=STRK:MEBIDX:IT

 

[soundwave]

these are the old cells i had.


its near the same so you think the Panasonics are fake then ?