Suitable for use in offices, shops, reception areas, restaurants, hotels, schools, hospitals TP(b) rated diffuser in accordance with BS2782.0:2011 Method 508A LED replacement for 4x18W T8 lay-in panels 50,000 hour average lamp life. Up to 5 times that of a standard fluorescent Fits into standard sizes of ceiling grid – 15mm and 24mm UGR <19 complies with the requirements of EN12464 for reading, writing and computer based tasks in offices and other areas Luminance <3000cd/m² at <65° for ease of screen viewing Very high efficacy exceeding 109lm/W Wide operating ambient temperature range of -20°C to +40°C Suitable for switching by PIR, Microwave or Photocell 1-10V and DALI dimmable driver options available R3EMPK4-PSU plug and play 3-hour emergency pack available