2ft 18w White Fluorescent Tube T8

Colour Ref numbers
Standard (Halophosphate)
23 or 35 or 135 = White
29 or 30 or 129 = Warm White
20 or 33 or 133 = Cool White
10 or 54 or 154 = Daylight
Triphosphor tubes
835 = White
830 = Warm White
840 = Cool White
860/865/765 = Daylight