cosco
Newly Enlightened
Hallo.
I have bougt a cheap head light yesterday. It costed me about $9. Bought with the intention to mod it with led.
It has following specs:
- 4x AA in series
- krypton 4.8 V/0.7A bulb
- weather proof (some o-rings)
- plastic housing
- plastic lens and reflector, permanently mounted in the bezel
- focusable
here are some pics:
light:
battery compartment:
Inner size of the light is 54 mm / 2.1 inch.
Reflector hole is 13.5 mm / 0.53 inch.
Light bulb is moved by the black knob back and forth.
Picture of disassembled mechanism:
I would like to preserve the focusing ability. The first idea was to mount a kind of aluminium heatsink and 1w or 3w luxeon on the focusing mechanism. Some questions came in my mind then:
1/ If the heatsink will be locked in the light wont it lock the heat inside as well? I do not want to drill holes to spoil the watterproofnes. Does not the heat from the heatsink melt the plastic material of the housing?
2/ Is the luxeon the right emitter because of high consumption? I would like to be able to run the light for few hours (3-5) but also want bright light. Cluster of leds is not focusable and I would not be able to use the reflector.
3/ If luxeon is OK, I can rewire the battery to make 2-2 AA in paralel and use some boost circuit or let the cells in series and use some buck circuit. Which would be better for runtime/brightnes?
My intention is to use the modified light when exploring some caves.
Thanks for your ideas/suggestions.
I have bougt a cheap head light yesterday. It costed me about $9. Bought with the intention to mod it with led.
It has following specs:
- 4x AA in series
- krypton 4.8 V/0.7A bulb
- weather proof (some o-rings)
- plastic housing
- plastic lens and reflector, permanently mounted in the bezel
- focusable
here are some pics:
light:
battery compartment:
Inner size of the light is 54 mm / 2.1 inch.
Reflector hole is 13.5 mm / 0.53 inch.
Light bulb is moved by the black knob back and forth.
Picture of disassembled mechanism:
I would like to preserve the focusing ability. The first idea was to mount a kind of aluminium heatsink and 1w or 3w luxeon on the focusing mechanism. Some questions came in my mind then:
1/ If the heatsink will be locked in the light wont it lock the heat inside as well? I do not want to drill holes to spoil the watterproofnes. Does not the heat from the heatsink melt the plastic material of the housing?
2/ Is the luxeon the right emitter because of high consumption? I would like to be able to run the light for few hours (3-5) but also want bright light. Cluster of leds is not focusable and I would not be able to use the reflector.
3/ If luxeon is OK, I can rewire the battery to make 2-2 AA in paralel and use some boost circuit or let the cells in series and use some buck circuit. Which would be better for runtime/brightnes?
My intention is to use the modified light when exploring some caves.
Thanks for your ideas/suggestions.