Thunder (TM) Sunmax 8-Inch White Air Coolable Reflector for Plants with Easy Location Mounting Special (5 Year Manufacturer Warranty !) Dimension 41" x 28.5" x 10" (L x W x H) "Vent to Vent" / Vent Size 8" Broad Light Dispersion: Tempered Glass broadens the amount of light allowing close placement of plants for. Equipped with a collapsable glass panel for easy lamp replacement. Steel construction encased in fully heavy duty poweder-coated galvanized steel. Made 95% reflective German aluminum for excellent reflectivity. Equipped with an integrated rentation bar for an air tight seal and solid grip of glass. Fully packaged with built-in socket, 15' pre-wired lamp cord. Compatible with HPS and MH bulbs 250W - 1000 W. Compatible with Square or SL Reflector Light Socket. Socket E39. Air Tight Seal: Equipped with an integrated rentation bar for an air tight seal and solid grip of the glass. 5 Year Manufacturer Warranty !