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  • blorfadillo commented on jaksherry's instructable 100W LED in PVC Flashlight3 years ago
    100W LED in PVC Flashlight

    Nice. Based on a quick look around and noting that these 100W/9000lumen LEDs consume about 3000mAh, I'd guess it has maybe 20-30 minutes run time using 2500mAh rechargables. A couple mods that came to mind were to use 4 Li-Ion batteries @ 3.7V each to achieve approx the same working voltage/capacity or possibly 9 to give you a ~34-36V output either in a 9 in series or 3x3 in series config. That would eliminate the DC stepup part. The plus with the 3x3 config is that you could use a charger made for a 12 volt pack. Seems like with a little redesign, you might be able to charge in place although at a fairly low rate to avoid overheating the batteries since there's no air circulation to speak of. Maybe a few holes around the area where the fan is mounted, and a few holes elsewhere for exh...

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    Nice. Based on a quick look around and noting that these 100W/9000lumen LEDs consume about 3000mAh, I'd guess it has maybe 20-30 minutes run time using 2500mAh rechargables. A couple mods that came to mind were to use 4 Li-Ion batteries @ 3.7V each to achieve approx the same working voltage/capacity or possibly 9 to give you a ~34-36V output either in a 9 in series or 3x3 in series config. That would eliminate the DC stepup part. The plus with the 3x3 config is that you could use a charger made for a 12 volt pack. Seems like with a little redesign, you might be able to charge in place although at a fairly low rate to avoid overheating the batteries since there's no air circulation to speak of. Maybe a few holes around the area where the fan is mounted, and a few holes elsewhere for exhaust. Another thought might be to get a 2" diameter heatsink an few inches high, "star" shaped [looking at the ends] that glued to the LED but fit inside the cleanout adapter, and then a 2" coupling into which the body would fit on one side, the heatsink on the other. The other idea would be to rig up a variable output via resistors/switch, either a hi/lo or hi/med/lo using hi for searchlight mode, med and lo to conserve battery. Alternately, you could use a 2" to 3 or 4" adapter and mount 3 different LEDs, say maybe a 3 or 5W for "lo" (or something in the 1-300lumen range) giving maybe 10-20hrs run time, a 30W for "med" (around 1000lumen) with maybe 1hr run time, then the 100W for blinding/searchlight mode. Also, I think your parts list should call out 2 cleanout adapters, and only one plug rather than the other way around.Where did you get the lens assembly? It would be nice to see a picture also.Thanks.

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