Philips Slimline 20-Watt LED Batten (Pack of 4, Cool Day Light) Wide voltage protection of 160-360v with 2kv surge protection. Even and comfortable light perfected for your well being. Glare reduction and no visible flickering to prevent eye strain. Available in full size of 4ft (1214 mm) and in colour temperatures of 6500k, 4000k and 3000k.