GrowLush 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 penetrate fog
• High output, high luminescence efficiency.
• Fit for all standard 400 watts HPS grow light systems
• Long life and high efficiency for energy saving