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!
Step 2: Removal
Step 3: Rear View
DO NOT be tempted to just solder your LEDs on here, as there is a transformer on that board that WILL fry them - as a friend recently found out.. :o/
Step 4: Desoldering
When the board is free, de-solder the next two connections at point 2 on the picture, freeing the wires, don't throw these wires out, they're going back in!
Step 5: Goodbye tubes!
Finally solder your red wire to one side of the switch (circled). The white one we will use in a while.
Step 6: Adding the LEDs
Drill six holes at equal distances on the outer edges of the light base, at either end one LED in and another roughly in the middle. Carefully tie these in place ensuring that your LEDs point out at right angles to the holder -see picture! Trim off the tails and turn the fitting over.
Step 7: Wiring the light
Solder both negatives together and both positives together.
The positive wires we now solder to the other side of the switch and remember the white wire? We now solder the white wire to the negative wires.
Step 8: Let there be light!
Tuck the wires back up into the roof and replace the Philips screws.
Turn on and pat yourself on the back, you are now a 'Green vanner'!
Now, back to my wind generator experiments... Any questions, give me a yell!