The Energy Focus 300D Series LED tube is a general-purpose lamp for 4ft T8/T12 linear lamp retrofits. At 13W and 1560 lumens, the 300D is single-end powered features an aluminum backbone with a plastic frosted lens cover. The single-ended, direct wired lamp offers 140 lumens per watt and a 120-degree beam angle for superior energy savings compared with a fluorescent lamp and ballast system. The 300D Series lamps are UL Classified as a 4ft T8 LED retrofit and DLC listed to offer eligibility for state or national rebate programs. The 300D Series lamp requires unshunted G13 lampholders for single ended power. Energy Focus has reported a life of L70 (maintaining 70% of the initial lumens) of 60,000+ hours. The 300D Series LED lamp has less than 1% flicker to prevent headaches, eyestrain, migraines, seizures and other visual distractions associated with optical flicker.