How about being able to have all of the lights on and still not draw as much power as one of those fittings? Ahh enter the humble LED..
Step 1: Tools
A soldering iron, flux and solder
A thin bladed screwdriver
A 'Philips' or cross headed screwdriver
A cordless screwdriver and 4mm drill bit
A quantity of 4mm clear plastic ties - DO NOT use black as these will show up when the light is on! (To work out how many ties you need, if the lights are twin tube, you need six for each one)
A pair of sharp snips to trim the tails off
Extra gas for your soldering iron, just in case!