I use the Philips 400w mastercolor hps retro-white ceramic metal halide. Only works in a 400 watt hps magnetic ballast. The full color spectrum of this bulb is unmatched in my opinion and I have had excellent results with it.

I use it from veg through flowering. Before switching to this bulb last year, I had been using the eye hortilux. you can get them for $50 - $60.

Has anyone else tried these bulbs?

Regards,
JT
JohnnyToke Reviewed by JohnnyToke on . which bulb is superior which of these bulbs are better Grolux 400w Dual Spectrum Sunmaster 400w Son T Plus Rating: 5