GL MH 400W Retro Lamp Bulb - 3700K Growlush As a stone of harmony

As a stone of harmony

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GL MH 400W Retro Lamp Bulb - 3700K Growlush As a stone of harmonyGrowLush MH 400W Retro Lamp Bulb 3700K Works On HPS Gear Only* Retro MH Bulbs give you the same spectrum as MH bulbs but work on HPS gear. So if you've only got a HPS ballast these bulbs let you get the results of a MH light without having to buy a MH ballast. GL MH 400W Retro Lamp Bulb SPECIFICATIONS: Power: 400 watts (High efficiency) Expected Life Span: 10,000 hours Lumen: 52,300 lumens Contains both blue and red spectrums. Strong power to