D
Downer
Guest
You were talking about the relative effort of fitting an LED to a Zoom (as against a regulator for a halogen bulb) so I assumed you meant those ready-made conversion kits that you just screw in. I haven't used one but as they've been around for a while they would presumably be the usual blue-white horrors but I may be wrong.
But I am very intrigued by your 100lm/W figure! The best Luxeon Vs easily available commercially seem to manage 25lm/W and that's with the standard so-called white, which ,if the smaller Luxeon I have before me is anything to go by, is another word for blue. The warm-white version is about half that efficiency and, from the published spectrum, is probably pink...
I would be extremely happy to use an LED putting out 50lm for just .5W and might even forgive it if it was a bit blue. In fact, there must be a commercial opening there as that sort of performance would sweep expensive Li-Ion based headlamps off the scene. A single AA NiMH would give you 6 hours at full brightness - and you don't need 50lm all the time by a long way. That would be a real breakthrough. Price might be a factor - paying £200 for a single LED would put me off.
But I am very intrigued by your 100lm/W figure! The best Luxeon Vs easily available commercially seem to manage 25lm/W and that's with the standard so-called white, which ,if the smaller Luxeon I have before me is anything to go by, is another word for blue. The warm-white version is about half that efficiency and, from the published spectrum, is probably pink...
I would be extremely happy to use an LED putting out 50lm for just .5W and might even forgive it if it was a bit blue. In fact, there must be a commercial opening there as that sort of performance would sweep expensive Li-Ion based headlamps off the scene. A single AA NiMH would give you 6 hours at full brightness - and you don't need 50lm all the time by a long way. That would be a real breakthrough. Price might be a factor - paying £200 for a single LED would put me off.
