METAL HALIDE LAMPS - This type of light is blue-orientated in the spectrum. It is the best type of light to be used as a primary light source (if no or little natural sunlight is available). This type of lamp promotes plant growth.

1000 Watt MH Standard Lamp is rated at 110,000 lumens

Select from 3 different brands: Osram/Sylvania, Philips or GE