Mosquito collections from New Jersey light traps operated with flashing on/off cycles (measured in seconds) of 1/1, 5/5, 10/20, 20/10, 30/30, 45/15 and 59/1, as well as a non-illuminated trap, were compared with continuous light controls in northwestern Bexar County, Texas. No mosquito specimens were collected using the 1/1 cycle and very few specimens were collected with the 5/5 cycle. When compared to continuous controls, the remaining intermittent cycles attracted a number of mosquitoes roughly proportional to the percentage of time during which the light was on over a 1 min period. Use of various flash cycles did not result in any detectable species selectivity within the collections.