Grow Metal Halide Bulbs Optimised for electronic ballasts. This tuned spectrum metal halide 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. Optimised spectrum metal halide grow lamps provides high initial and maintained lumen output with optimum spectral energy required for vegetative growth. Available in 400W/600W/1000W
