T9 G10q Circular Fluorescent Tube 40 watt 406mm diameter Daylight an energy efficient light source providing an alternative to conventional strip lighting enabling the use of eye catching slender and shallow ceiling and wall mounted fixtures. This slim fluorescent tube offers excellent colour rendering and stable light output together with an impressive 10000 hour lamp life. The Daylight colour of this lamp is particularly suitable for applications where daylight simulation is required or necessary. This product is a tube only and requires control gear to operate.