This shaft light series are designed for easy installation in the shaft, with build-in brackets, stable internal cables, the lights can be composed to one set and pull down from the top of shaft, then fix them with self-drill screws, easily and fast ! We have t5, t8, ip65 for your choice, which all pass ce, tuv, ul, highly recommended is our ip65 series, protection level is ip65, more application in outdoor. Specification: -energy efficient, low voltage bulbs 36w -fully complaint with en81 part1 and 2 -kits are available for 20 units connection (10 units a team to prevent over loading ) -required power supply for 230-240vac -the kits comes with all required plug and play cables, fixing & mounting brackets. -simple three wire system or double control four wire system as required.