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BeeJ said:
Suggestions on acquiring or building a High Candlepower Beam
Input: 12VDC
Output: Best I can get.
I have seen some "rated" at 3 million candlepower; is that for real?
Are there any brighter?
The good old spot lights are having good and quite big chrome plated
reflectors, so they collect most of the light of halogen in the spot.
But the lumen wattage performance of halogen is poor compared to
LED or HID. So much brighter lights are not a problem......
The highest intense spot I achieved so far was using
a 2mm long high pressure arc bow with a tube build for 24W DC.
It is running wiht an AC current at 5-6kHz instead to avoid cathode
fall regions.
The reflector is always very important
in combination with the size of the light source itself.
The proper adjustment and mounting is tricky, when smaller diameters
are in use.
One of the best reflectors for a standard D1S or D2S MPXL bulbs you
find for instance at MIL flashlights like
http://www.nightreaper.com
The half angle of the beam is very narrow I guess just +-1°
LEDs gives you also impressive spot lights, but only when doing
it right: You can get just
in the center an impressive blue spot, which is just the
blue chip and the yellow of the luminance material is in the outer
ring and you wonder why your several watt LED chip is less good than a
well designed LED from for instance LEDLENSER running at lower power.
rgds
Joerg
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