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Want to make a relatively high powered night handheld flashlight Answered

Hi guys, im new to electronics and stuff, but i work at a movie theater, and cleaning in the dark isnt fun...lol so, after seeing that awesome ultrabright headlight instructable, i was wondering if the "Ultimate Biker's Night Headlight" could be modified into a smaller, handheld version? Thanks in advance.. -robi

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Thelonelysandwitch

9 years ago

try fenix lights they are great. The sites are fenix-store.com and fenixlight.com

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moonlighttech

11 years ago

I like my Fenix 1 watt LED single AAA cell flashlight. It's approx .5" dia X 2.9" long. Fits a keychain or pocket easily. 3 intensity levels of 4.5, 12(default), and 30 lumens (very bright!). The quality is top notch, it's my swiss army light, but the "Rolex" like price is high. Perhaps you can find a clone at half price or less. Just my $.02 for your situation. I think it would be perfect.

I love fenix lights, I just got a fenix Digital L0D Q4 it is great. it goes to like I think 75 lumens with 2 other lower settings.

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robi7412LasVegas

Reply 11 years ago

Hehe, i was actually talking about using high-powered LED's instead of the krypton or incandescent bulbs, thanks for the links though. My main concern was actually how small can the biker's night headlight be reduced into? :D maybe with using just 1 or 2 LED's instead of 4...would it be pretty much the same? :D thanks again in advance... :D -robi

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LasVegasrobi7412

Reply 11 years ago

I would squeeze 5 or 6 LEDs into a tight pattern at the head of the flashlight. There would be no need for a reflector since LEDs, by their very nature are directional. Using the 3 Lithium batteries, you could drive 6 LEDs in series/parallel as 3 sets of 2 LEDs perhaps even without a current limiting resistor, to get the most life out of the batteries.

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robi7412LasVegas

Reply 11 years ago

im actually curious why the ones i saw here being made needed heatsinks...do the LED's really put out that much heat? -robi

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westfwrobi7412

Reply 11 years ago

Yes, they really put out that much heat. Figure a normal 20mA 5mm LED uses about 70 mW of power (3.5V * 20mA.) A state of the art high power LED uses 3 to 5W of power; about 50 to 70 times more, at about the same efficiency.

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LasVegasrobi7412

Reply 11 years ago

Those are ultrabright LEDs and do tend to get hot.

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HamO

11 years ago

I'm looking for a really high powered "day" flashlight!

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kishida

11 years ago

I had bought a Luxeon 3 watt flashlight last year, for about $20 (?), but I forgot where I bought it from. I think I searched ebay, for the cheapest price. I somewhat recall that it was shipped from Hong Kong. It works fine and uses 3 AAA batteries in a holder that keep the flashlight, just a little longer than the length of one AAA cell.