Metal Halide bulbs have a slight bluish light and are primarily used for
The vegetative (first) phase of Plant growth. The type of light produced
From MH is near the spectrum closest to sunlight (5500 Kelvin) which
Encourages normal growth.

This Optimized Spectrum MH Grow Lamp allows you to
Stretch your growing season to 365 days a year. Fine-tune
Your lighting system to provide optimum spectral energy
Levels that promote vigorous plant growth.
Optimized Spectrum MH Grow Lamps provide high initial and
Maintained lumen output with optimum spectral energyrequired
For vegetative growth.
Optimized Spectrum Metal Halide Grow Lamps are designed to
Grow high quality, natural looking plants during all phases of their
Growth cycles.