Spa Resource
LED Versus HPS Grow Light Comparison Lumigrow vs Hortilux 600 watt Best 600w Light

Aries series led corn light bulb mogul e39 base 5000k for hid/hps/metal (leds uses a driver, not a ballast). About RuggedGrade Industrial Grade solutions at affordable prices Rugged Grade Lighting is a California, USA Based company. Please note that in some cases the ballast may have to be bypassed when changing to LEDs.