VIPARSPECTRA Timer Control Series LED Grow Light is scientifically engineered to keep the balance of the PAR output and coverage. Built-in timer design allows you to turn the light on and off automatically. Dimmable feature can be used to program VEG and BLOOM brightness individually. With revolutionary aluminum heat sinks (0.8inch height) and quiet high speed cooling fans, runs 70% cooler than HID lights. Coverage Area: 300W compares to traditional 250W HPS/MH while consuming only 135W! Perfect for a 2.5 x2.5ft vegetative coverage at 24?inch while 2x2ft flowering coverage at 18 inch. 450W?compares to traditional 300W HPS/MH while consuming only 205W! Perfect for a 2.5 x2.5ft vegetative coverage at 24?inch while 2x2¡¯ flowering coverage at 18?inch. 600W coompares to traditional 400W HPS/MH while consuming only 260W! Perfect for a 3x3ft vegetative coverage at 28?inch while 2.5x2.5ft flowering coverage at 20?inch. 900W?compares to traditional 600W HPS/MH while consuming only 405W! Perfect for a 4x4ft vegetative coverage at 32?inch while 3x3ft flowering coverage at 24?inch. 1200W compares to traditional 800W HPS/MH while consuming only 530W! Perfect for a 4.5x4.5¡¯ vegetative coverage at 32?inch? while 3.5x3.5ft flowering coverage at 24?inch. 1350W?compares to traditional 1000W HPS/MH while consuming only 608W! Perfect for a 5x5ft vegetative coverage at 44?inch while 4x4ft flowering coverage at 32?inch. Specific Product Information: Model VT300 TC450 TC600 TC1200 TC1350 TC900S Vegetative Coverage 2.5x2.5ft 2.5x2.5ft 3x3ft 4.5x4.5ft 5x5ft 4x4ft Flowering Coverage 2x2ft 2x2ft 2.5x2.5ft 3.5x3.5ft 4x4ft 3x3ft LED Chip Power 60pcsx5W 90pcsx5W 120pcsx5W 240pcsx5W 270pcsx5W 180pcsx5W Avg. Power Draw 135W¡Â3% 205W¡Â3% 260W¡Â3% 530W¡Â3% 608W¡Â3% 405W¡Â3% HPS Replacement 250W 300W 400W 800W 1000W 600W Timer Control Yes Yes Yes Yes Yes Yes Remote Yes Yes Yes Yes Yes Yes Adjustable Intensity Yes Yes Yes Yes Yes Yes Daisy Chain Yes Product Dimensions 15.7 x 8.3 x 2.6 inches 19.7 x 8.5 x 2.8 inches 25.4 x 8.5 x 3 inches 25.4 x 16.5 x 3 inches 21.9 x 21.7 x 3 inches 20 x 19 x 6 inches Item Weight 7.6 pounds 10.36 pounds 12.5 pounds 23 pounds 27.6 pounds 19.85 pounds