Hydrofarm Daystar DAHA40L 400-Watt System with Agrosun Halide Bulb Emit mostly blue light for vegetative leaf growth 30% more red/yellow light than regular MS grow lights Cool to the touch, low profile for vertical clearance, multi-faceted, computer designed aluminum interior made from world's finest specular aluminum Consistent winner in head to head professional challenges Consistent winner in head to head professional challenges