Re: Zebralight H600
Posted: Jan 4, 2012 3:26 pm
Ryan, there's no question that the Spark and Zebralight are more efficient than the Sten (i.e. more lumens per watt). I think the run times you posted for the newer XM-L lights are based on a Panasonic NCR 2900Ah 18650 battery, whereas the Sten run times are based on 2300-2600Ah 18650s. A little bit of an apples to oranges comparison. I might expect that these newer lights can give approximately 50% longer run time at the same lumen output using the same battery. It's difficult to impossible to get good direct comparisons between lights because the lumen output settings aren't always the same, batteries used for run times aren't the same, lumen measurement standards aren't the same, etc. Zebralight does seem to do a particularly good job with their control circuitry and optics to get close to the ideal efficiency for the LEDs they utilize.