Because they are most often used fo

Because they are most often used for object lighting in architectural interiors, color quality is an important aspect to consider when evaluating PAR38 lamps. Of particular importance is performance relative to halogen lamps, which are the incumbent technology in this application category. The CCT of the Series 20 LED PAR38 lamps ranged from 2742 K to 6404 K, as shown in Figure 7. More importantly, 35 of the 38 products had a nominal CCT of 2700 K or 3000 K,9 which matches the two nominal values that bookend typical halogen PAR38 color temperature. Only two products (12­76 and 12­101) did not fall within the range considered acceptable for ENERGY STAR qualification.