Low voltage T8 Tube light. Can be powered by one end. Uses from 12V to 36V AC or DC. G13 end caps. The tube is available in daylight white 4000K. Uses only 10 Watts comparable to a 20 Watt fluorescent bulb. 120 degree viewing angle. End caps are rotatable. This product is a Non Cancelable, Non Returnable, Non Warranty. This is due to the tube could be installed in a fixture with a ballast and this would cause the tube to fail due to over voltage. Each tube is tested before being shipped.