CT-800 provides consistent and uniform light intensity across the plant canopy and contributes to better growth and development.This light fixture draws 800 watts, producing 2240 umol/s of light and an unbeatable 2.8 umol/j efficiency spread evenly across a 4'x4' / 5X5' grow tent. The dimming knob allows growers to adjust brightness with 0-10V dimming capabilities to meet plants' changing needs. Growers can also adjust the metal string to get the proper lighting that your plants require.