... intensity control,there are 2 kinds of adjusting level for your option.up to 15,000-20, ... to 25,000-32,000Lux@ feet (the second level output)-remarketable,Continually Operating Time: up to 7 hours ... (highest in the first level output)-longest,up to 4 hours (highest in ... centigrade (highest in the second level output)-be careful,Color Temperature: 6000 K(pure white),Illumination Spot Size: ...