Quote:
| Originally Posted by KevinJ Steve,
Metal housings are the only way to go. Inadequate heat sinking is the major killer of LEDs. There are a few plastic bodied LED lights out there but they're usually not run at anywhere near rated power. Those that are have a fairly short life before turning yellow.
Oops ! There I go, giving away trade secrets again. 
Regards,
Kevin |
Thanks Kevin,
The plan is : umbilical design, aluminium body, 5 x Cree Q5's in series driven at 700ma by a boost regulator, all mounted on a thick copper heatsink which in turn is attached to the torch body so that it forms part of the heatsinking.
15 bar rated cable gland, magnetic switch to turn on and off, and to provide dimming steps. If that all works fine without heat problems then the eventual plan is to ditch the Cree's and run 3 x Osram Ostar whch should give me around 3000 lumens...they're expensive though
