Boggy wrote:
Can you estimate how many lumens your LED gets at 7A? Regarding that lens, I really don’t know how it will perform with my huge area LED.
I’m guessing you meant 120mm focal length(12cm, ~5inches)? At that distance I would be losing a ton of spill from my 90 degree lens that’s on the LED. I think that’s the biggest problem right now for my build.
I should have said 6 to 7 amps. I think I measured 6+ amps with stock DMM leads. So actual current to the emitter could have been 7 amps for all I know. Sorry for not being more specific in my post. I was running DD with 2S average laptop 18650's. So current would have been what ever they could deliver. Definitely wouldn't have been over 7 amps though.
You are absolutely right. I said it had a longer focal length than your lens, but I mistakenly wrote mm, instead of cm. You are correct at about 12 cm. You are also right that you would have no spill. At least, when it is fully focused, unless you used a reflector. I intend to use mine out of focus for both high and low beams because focus would by too small a hot spot and way too much throw for driving around. I would like to check into your lens though. It sounds interesting.
I really like how you ask "smart questions". Keep up the great work. I think this is a very good project you have embarked on.
EDIT: Here is a link to Fritz's (see next post below) thread on the lens he mentions.