The Diogen T8L1200-18W-02-120-32 T8 LED tube lamp provides exceptional LED lighting with reduced energy and maintenance costs. Measuring four feet in length and operating at 18 watts, this lamp has a beam spread of 180 degrees, a halogen white color temperature of 3200K, and a rated lifetime of 50,000 hours. This LED lamp is mercury- and glass-free for safe installation, making it a top-of-the-line replacement for standard fluorescent lamps. This lamp is an ideal T12 replacement as well since it uses the same non-shunted lampholders that a T8 does. The T8L1200-18W-02-120-32 T8 LED tube lamp is also UL listed and LM-79 certified. To be installed by licensed electrician only. Requires non-shunted lamp holders (tombstones). See part no. SOCK-L13051U. Do not use with dimmers.