High output Metal Halide Bulbs produce light by arching electricity through a mixture of gases. The light produced is in the white-blue spectrum, which encourages vegetative growth and “bushiness” while discouraging upward growth.
These high intensity discharge (HID) lamps are to be used during the vegetative phase of plant growth. One year warranty.
250 Watt – 21,000 initial lumens
400 Watt – 36,000 initial lumens
1000 Watt – 110,000 initial lumens