Theyâre âChinese voltsâ, kinda like âChinese lumensâ. You know, how a 3ĂAAA light with Latticebright XP-E lookalike chip can produce 2,0005,000 8,000 lumens.
And the really bad thing, is there are uninformed people that fall for it. :person_facepalming:
And they think its the greatest thing ever since a 2D mag is what there use to until I pull out my D4.
Yes and no.
Sure most of those ratings are exaggerated. But producing a high voltage from just a single battery is no rocket science. The problem is when you want some power. Meaning, increasing the amps. Those devices might have a huge voltage but there current is very low. Dont forget that just 20mA (out of my head, exact figure can be slightly different) trough your heart could kill you.
You might ask now, but why is a hot rod flashlight that is pushing 10 or more amps to the emitter not dangerous?
Thatâs because the voltage is too low. Our skin has a very high resistance and thus a low voltage wont hurt us. Thatâs also why many (âinsulatingâ) materials that are being used in or around electrical equipment are rated to a certain voltage. Above that there is a possibility that the electricity can go trough it.
I went to my father last weekend and he was proud for his new âvery bright light, as bright as the one you gave me a few years agoâ, which he purchased locally online for 10-15 euros.
The one he referred to was this: http://www.dx.com/p/aurora-ak-p7-5-ha-iii-ssc-p7-c-2-mode-900-lumen-led-flashlight-with-assault-crown-1-18650-15739 and no, his new light isnât that bright. It has a generic XP-E sized led pushing 100-150 âthrowyâ lumens, due to the tiny emitter. I was carrying an S41 Nichia at the time with a fresh Q30 which I shined to the ceiling saying something like âthatâs not bright, this is brightâ. My brother nearly choked laughing.
Yeah, Iâve gotten that. âLookit my bright new light!!â Love when I get the follow-up âItâs probably even brighterân yours!â, referring to my little 1-mode ~500lm â502.
Then we turn off the lights and do a ceiling-bounce test. Yeah, their âbrightâ lights are probably 100lm-150lm.
My favorite was a LB-fueled C8 wannabe. Sure, nice tight hotspot, quite bright, but 100lm concentrated into a small disc. Just for s&g, I trot out my C8A. The C8-wannabe illuminates the room, kinda, sorta. My C8A lights up the room as if someone flicked on the room-lights. :smiling_imp:
Oh man, I just thought that since I carry a Nitecore Tini on my keys, I should be shining that instead of my pocket light. That little thing amazes me every time I turn it on, I canât imagine how it will look to the eyes of a non flashaholic holding a full sized 100-150 lumens âPolice Tactical 10000 lumens Maybefireâ
2) Driver recommendations for a max-effort Trustfire TR-J19 - running 3x XHP70.2 P2 1A (likely 2S/6V)?
I have a TR-J19 which can run either 32650 2S or 3S, with a really bad driver in it. Itâs been collecting dust since I bought it, and I want to update it. Itâs massively heavy so it can take a lot of heat.
Many different drivers do that and the electronics experts have a good explanation for the phenomenon. There are design options for drivers that prevent it. That is all I know.