MH Powerplant 400W

Metal halides have the more balanced spectrum.

The light they give out has a significant amount of light from the bluer end of the spectrum, which the plant uses to grow vegetatively. It produces plants with a small internodal length, with large leaves and thick stems. It produces the most natural looking plants. It simulates the light from the beginning of the year and is good for plants before they're switched into flowering mode.

They're normally slightly more expensive than HPS. Recently, there have been 'enhanced spectrum' MH bulbs produced which also give off a significant amount of red light. Conversion bulbs are also available which plug into HPS ballasts which are actually MH bulbs. Useful for changing the light balance without changing the ballasts also. In the event of a power failure, they need about 20 minutes before restating. They may restart earlier but it shortens the life of the bulb quite dramatically to try and start a hot bulb.

• Power Plant HIT/HBU/LU Metal Halide Lamp - 1000 watt.
• Power Plant Metal Halide lamps promote optimum vegetative growth and flowering.
• Provides a richer more nutritious light
• Compatible with standard HPS ballasts and ignitor systems. Lamps can simply be changed to maximise growth protential.400w hps = 38,000 lumens