That's where the driver/regulation board comes in.
Adding to what Marduke said, LED dice get more efficient when they are run at low power. Thus, running four dice in parallel would be a little bit more efficient than running a single die at the same total current. Using a P7 at 2.8 amps would give you lots of power if you wanted it but would not compromise on runtime when run on low power.
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+1 Torchboy :thumbsup:
Just my 2 cents now !
If you want very long runtime then choose a flashlight with modes.
The model that I proposed has 3 usefull modes and with a 2000 mAh pack of cells you will get :
- full power = 2.8 A --> 45 min
- medium = 700 mA --> 2 hours and 51 min (well 3 hours !)
- low = 50 mA --> 40 hours :candle:
For the visual comparison of this led with the "almost best" Cree model (I mean the XRE CREE Q5), I must say that the P7 is a bit more purple (less soft light than the Q5) BUT it is impressively more powerfull.
I would say more than twice more light with the P7 rather than with the Q5.
Furthermore the P7 being composed of 4 dies, it has a wider beam than any other led. And if I remember you were looking for a wide beam light...
So don't skip too quickly the P7 die... well driven with a good driver with modes, it is really a fantastic light
JP