Question about my SF U2

scaredofthedark · Mar 25, 2008

is it normal that only half of the LED lights up when on the lower 2 stages?
i've never seen this before. until right now when i pointed it into my computer screen and looked at the reflector

Kilovolt · Mar 25, 2008

I have just shined my U2 against the PC screen and all four parts of the LED are lighted even at the minimum level. Have you checked the batteries?

DCarlton · Mar 25, 2008

Hello

I think that the Lux 5 has a die made of 4 sections. I have noticed on a LK4 that when the batterys are drained on mine and you slightly push in the momentary push only one or two of the 4 sections light up. I presume they have a lower Vf than the other to so o/p before the others. i presume a similar thing going on in the U2.

Dan

WildChild · Mar 25, 2008

scaredofthedark said:
is it normal that only half of the LED lights up when on the lower 2 stages?
i've never seen this before. until right now when i pointed it into my computer screen and looked at the reflector

This has been seen on LuxV driven at very low level. 2 dies light up before the 2 others.

scaredofthedark · Mar 25, 2008

i just charged the LiIons.
but i guess it seems that half of them lighting up is normal

thanks

Illum · Mar 25, 2008

considering luxVs utilize a series-parallel configuration, only the series part would light up if there are insufficient current output from the cells, but why they would use dies of different Vfs we might never know:shakehead

Paladin · Mar 25, 2008

I would check that out carefully on the higher levels with fresh cells. The first U2 I got had half the die "dark" on all levels, and was replaced by the vendor.

Paladin

Question about my SF U2

scaredofthedark

Enlightened

Kilovolt

Flashlight Enthusiast

DCarlton

Newly Enlightened

WildChild

Flashlight Enthusiast

scaredofthedark

Enlightened

Illum

Flashaholic

Paladin

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