Hi guys,
Well we have been speculating on where the luxeon III fits in relative to the 1W and 5W. We have seen that driven at 700 mA and 1 amp, the III is typically brighter than a 1W driven at similar levels and further, we are led to believe that the III can manage these levels of current better than the 1W.
I have a McL4 1W R2H on a BB400 and I wanted to see how a III on a BB400 compares. I made one (S rank III) and just checked lux of the two; essentially equal. They are so close (same) that variation in LED's will make one the winner over the other. I propose at this point that a III S rank can be considered as good as a R rank when driven at the 1W power levels.
After ten minutes on, both hosted on E1e's, the temperatures of the heads as measured by an IR thermometer show these two lights as having the same thermal output. I had hoped that perhaps the III would run cooler but given the same luminous output on the same level of power, it is no surprise that the wasted thermal energy would be the same; it kind of has to be!!
So, based on two meager data points, I suggest that if one is in hopes of obtaining a R rank 1W and can't, a S rank III will do just fine, thank you very much! If one can get a T rank III (will we see these?) Whoopie!!!!!!! It will be very interesting to see if any R rank 1W's ever show up any more...... If only Lumileds would give us the "real" dirt.
- Don
Well we have been speculating on where the luxeon III fits in relative to the 1W and 5W. We have seen that driven at 700 mA and 1 amp, the III is typically brighter than a 1W driven at similar levels and further, we are led to believe that the III can manage these levels of current better than the 1W.
I have a McL4 1W R2H on a BB400 and I wanted to see how a III on a BB400 compares. I made one (S rank III) and just checked lux of the two; essentially equal. They are so close (same) that variation in LED's will make one the winner over the other. I propose at this point that a III S rank can be considered as good as a R rank when driven at the 1W power levels.
After ten minutes on, both hosted on E1e's, the temperatures of the heads as measured by an IR thermometer show these two lights as having the same thermal output. I had hoped that perhaps the III would run cooler but given the same luminous output on the same level of power, it is no surprise that the wasted thermal energy would be the same; it kind of has to be!!
So, based on two meager data points, I suggest that if one is in hopes of obtaining a R rank 1W and can't, a S rank III will do just fine, thank you very much! If one can get a T rank III (will we see these?) Whoopie!!!!!!! It will be very interesting to see if any R rank 1W's ever show up any more...... If only Lumileds would give us the "real" dirt.
- Don