Have you heard about the best bulb for use in horticulture? The Phillips MasterColor Ceramic Metal Halide 400 Watt is like no other. Many customers are reporting stunning results. One Bulb for both VEG and BLOOM, there is no reason to change anymore.

The basics first - NO DIGITAL BALLASTS (you will destroy the bulb) only use a regular 400 watt HPS ballast, the are designed to be EITHER horizontal or vertical (they can not be used universally) and most growers report better success with the use of supplemental silica.

There are many benefits to these lamps - they have a great full spectrum output, they "throw" less heat, very little color shift (less than 200K over their life time) and can be used in both VEG and BLOOM. As a side note: many of our customers are replacing a 1000 watt HPS with two 400 watt CMH bulbs and getting much better results. The MasterColor HPS Retro White Ceramic Metal Halide are the real deal...try them you wont go back.