Metal Halide light produces an intense light of a blue-white spectrum excellent for vegetative plant growth. Geraniums, marigolds, mums, zinnias, and violets all thrive under Metal Halide light, as do most vegetables.

A plant grown under a halide light will often exhibit increased leaf growth, and strong stem and branch development. Roses grow hearty under metal halides, and seem to burst with buds before flowering time. A wonderful general purpose garden light, if your garden is to have only one light source, metal halide will be your best choice. Listed below are some typics of Metal Halide lighting systems.

Metal Halide lighting provides a well-balanced spectrum of visible light. For this reason MH is a viable lighting choice for all facets of plant growth. Although HPS can be better for the budding and flowering phase of growth, good results can be achieved with MH as well. MH is the best choice during vegetative growth and is an excellent choice for leafy plants such as lettuces and many herbs.

MH, like HPS, produces a lot of heat that may need venting. Again, it is important to make this choice before purchasing your lights so that you end up with an appropriate fixture.

Benefits of MH include

• Very well balanced spectrum
• Great for vegetative growth and leafy plants
• Good general purpose bulb, suitable for most vegetables

And a few negatives:

• Produce a lot of heat
• Less efficient than HPS
• Shorter bulb life than HPS

Metal Halide bulbs are a very versatile choice for a wide range of hydroponic applications.