18secs? Hot too just as I'm settling intio my 3 old Migrows ....lol Spoiler The MIGRO ARAY 4X4 500W LED grow light delivers high PAR and incredibly uniform intensity over a 4ft x 4ft or 1.2m x 1.2m grow space. Full spectrum - grow from seed to harvest High Efficiency 2.7 - high PAR - low power 2816 MIGRO branded LEDs - intelligent spacing - uniform spread Supersized heatsinks - LEDs run cool for longer life Power supply remote mounted - reduce heat for longer life Dimming - on board - daisy chain - external controller compatible here: