This is how you should do it.
1) Remember to switch off the main switch first.
2) Get yourself a ladder
3) Remove the faulty light.
4) Post mortem the light. The problem might be the starter, choke or that damn loose wire.
5) Tools used.
a) Screwdriver = to unscrew
b) Test pen = to check for the live wire (in case you forget item no. 1)
c) Hammer = Just in case, mana la tau.
d) Handphone = To call 999 (This is important when you really forget item no. 1 & you don't have a test pen around you)
6) Voila… Kau tim…. Sau Kong….