fukn around with a flashlight..

so i had a flash light powered by 3 aaa batteries, with 24 2mm leds i think, so i took an old phone charger rated at 5.1v 700ma and hooked it up, and plugged it in so they are now running about 10w, so whats the limit of effectiveness how many watt do you think my little led light could get away with? also the leds are on a circuit bourd, and there does not appear to be a heatsink, just a plastic piece that surrounds the leds to reflect the light.

I couldnt answer you, but I would not recommend playing with that anywhere flammable

SnotBoogie said:

I couldnt answer you, but I would not recommend playing with that anywhere flammable

Click to expand...

well you can recommend that, but thats not something i need to worry about.

are you trying to grow something with a flashlight?

jesus of Cannabis said:

are you trying to grow something with a flashlight?

Click to expand...

maybe if i can pull 20w, but no, not with the 10w its at right now. just an experiment, figured the best way to get my answers was to ask the fellow LED DIYers. but besides all that i got real lights, these little LED would be for like growing a chrysanthemum plant or something.

Power is always expressed in WATTS and symbolized by the letter P
Voltage is always expressed in VOLTS and symbolized by the letter E or V
Current is always expressed in AMPERES and symbolized by the letter I
What is the relationship these P, E and I ?
Technician can sort out the power formula in any formation on the following order.
Watt, P = I x E or
Current, I = P ÷ R or
Voltage, E = P ÷ I



3x AAA batteries = 1.5V X 3 = 4.5V
You increased the voltage to the LED's, they will draw only as much amperage as they can handle, and the socket/board/chip set should already be "regulated" and have a set ohm resistance. The output of the LED's that you have is static, with the exception of when the batteries die(dimming). Since it's hooked up to a power source, they should stay the same intensity. The only way you're going to get safe increases in output is to increase the quantity of LED's.
My flashlight puts out 180 lumens with a full charge(one high power LED, vs your cluster of LED's), and it's $145 flashlight. While I support your DIY nature, I doubt it will be beneficial to your growing.

thank for the info, that exactly what i was wondering. haha once again not for my cannabis. i would build something much bigger and nicer for that.