Mean of the number of specimens caught per night for all specimens, Diptera, Lepidoptera and other orders combined for each lamp type (n = 32 nights) for collections March–May 2014 in Los Angeles County, California. 95% confidence intervals calculated from generalized linear model for each grouping (see §2d). A, 3510 K custom LED; B, 2704 K custom LED; C, 2728 K custom LED; CFL, 2700 K compact fluorescent lamps; LED, commercial 2700 K LEDs; NO, control. (Online version in colour.)