Ya know when you open up a brand new set of christmas lights, and they come with that little bag of replacement bulbs? KEEP THEM! They saved me 50 bucks this year ALONE! I use these for making a normal christmas light sets flash on and off. The best part though is that all you need is the replacment bulb bag (and its contents) from a random flashing icicle set.
Step 1: This might be all you have to do!
This step can either be the first, or last depending on you light sets. If you are lucky all you have to do is pull out the entire bulb and replace it with a "replacment bulb" from your twinkling light set, and make sure it has to red tip and a wierd looking filament. It usually takes 2 flashing bulbs to get string of lights to work completely
Step 2: Making it Fit
Now there is a very good chace that your light bulb didn't fit in the new socket, this is fixed very easily
1.Pull the light out of the socket that you are going to put the twinkling bulb in
2.There will be two wires on the bottum of the housing of the bulb- bend them so they are straight
3.Pull the bulb out of the housing
4.Do the same to the random twinkling bulb
You should now have 2 light bulbs and 2 housings
1.Thread the contacts of the twinkling bulb into the new housing and bend into the proper postition ( polarity doesn't seem to matter ).
do the same to the other bulb if you want
Step 3: Plugging it in
Plug the flashing light into the socket of the set you want to flash.
Plug in the light set
add flashing bulbs as nesesary