Sylvania Grolux - 400 Watt (Dual Spectrum Lamp)

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GroLux 400w dual spectrum bulb The Sylvania Grolux 400w HPS lamp is a dualspectrum lamp with a high 58,000 lumen’s output. The lamp produces light mostly in the red part of the spe ctrum for excellent flowering but also produces some blue to make it also suitable for the vegetative growth stage. This bulb can be used for both phases and thus ensures a good vegetative growth and rich, dense flowers. Show more