Energy Saving: Equivalent to 40W fluorescent lamp by only using 18W, saving 50 percent on your electricity bill. Emits 2400 lumen of brightness per bulb, much brighter than the fluorescent tube. 6000K Daylight White Bulbs: Help reduce eye strain and increase visibility in office, classroom, hospital, warehouse, garage, hotel, shop and salon etc. Ballast Bypass: Must remove the ballast before installation, which eliminates future potential failure issues and ballast maintenance, saving time and money. Compatible with T8 or T12 bulbs with G13 base. Double End Powered: The lamp holders on one end of the tube must be connected to neutral wire, while the other must be connected to live wire.These bulbs are compatible with both shunted and non-shunted lamp holders.