Hydrofarm Agrosun Gold MH Horizontal H/O - 400W Agrosun Gold Halides make plants grow their best! A Hydrofarm exclusive, these spectrally enhanced halides are the best all-purpose growth and fruiting/flowering light you can use Emit more of the red wavelengths than the common halides The "Gold Standard" in plant growth lighting, and thousands are in use by satisfied gardeners worldwide Agrosun Halides outperform common Sodiums in 4.5" Geranium Test - 45% More Flowers Produced, 25% More Axillary Branching!