The Maxibright 600W Dual Spectrum HPS Lamp are used mainly during the flowering and vegetative stages. WIth lower levels of blue light, this removes the need to change lights during growing cycles as extra spectrum is added. Stable levels of photonic enhanced spectrum delivered at both lowered and over-driven power outputs. Emits 10% more light than standard HPS lamps. 90,000 Lumens output Safe design prevents overheating.