Frameless LED flat panels for office or commercial lighting. Back-lit for maximum lumen output. Optical polycarbonate diffuser for even light distribution. Separate diffuser and frameless design gives the same appearance as a fluorescent modular when installed. Suitable for installation in 15 & 24mm T-bar ceilings. Dimmable (1-10V) and emergency versions are available. Average expected LED life - 35,000 hours. 3 Year guarantee.