Metal Halide

MH (metal halide) grow lamps produce a cool white light which is great for the vegetative stage of growth in living soil grow rooms. MH globes mimic the sun on a clear sunny day, promoting healthy leaf and stem formation, with a minimal amount of stretching. MH grow lights are often used for the first stage of growing flowering plants to help control the grow. This is because flowering can be initiated more easily when the globe is switched to HPS, and the daylight hours are reduced.