This Robus branded circular LED bulkhead has a built in colour selection switch on the PCB allowing the user to choose either 3000K 4000K or 6500K. It uses only 15 watts of power to produce a 1240 1420 and 1360 lumen output (respective of colour temperature) which is equivalent to the old type 38W 2D fluorescent fittings. It is suitable for switching via regular on/off systems as well as PIR Microwave and Photocell systems.