It all begun when the lamp in our bath started to blink like a disco lamp - blinking all the time. All of a sudden on the next day it did not have any signs of life ... it was dead.
We decided to simply replace it and went out to the store. Surprisingly the new replacement lamp was 10 pounds and we decided not to buy it from that shop :(
We went home sad ... and later that evening ... EUREKA !!! Why don't we use another lamp that I bought earlier this week just to have a spare one and it was only 30 pence, what a bargain I thought.
Not only it looks so cool, but it also works just perfect.
Step 1: Risk evaluation
- Reproducing the steps in this instructable may harm you.
- Be careful when working with high voltage, take all possible safety actions.
- You have to have appropriate knowledge and training.
- Use the right tools.
Step 2: What? Why? How?
Why? It has all to do with the construction of these lamps. They need special control circuit to limit the current through the tube, which would otherwise rise to destructive levels due to the tube's negative resistance characteristic [wikipedia]. (Read more in the links below)
How? The thing is that the fluorescent tube of our original lamp was separated from the starter and the ballast circuitry. On the other hand the new lamp had the starter and ballast circuitry attached to it, so it had to be separated.
Fluorescent lamps - read more
Starters for fluorescent lamps - read more
Ballast for fluorescent lamps - read more
Why was it not working? See the dark spot on the glass tube - this is the problem that caused the lamp to blink and then stop. This could be caused by a weak starter or ballast.
Step 3: Separate The Plastic Base
Remember how you cut the connections: one end of tube from left connections, other end of tube from the right connections.
We need the plastic base that has the connections on it.
Step 4: Separate The New Glass Tube
Unsolder the four wires that are soldered to the circuit.
Step 5: Soldering
Solder the cables of the new glass tubing to the old lamp's plastic holder.
Make sure you don't get the connections wrong. One end of tube to left connections, other end of tube to the right connections - just as before.
Step 6: Insulation
Step 7: Ready
It looks like a space ship now.
Step 9: Climb Up To The Ceiling
It's a matter of unscrewing the old one and screwing the new starter. Just make sure the wattage is OK. The new lamp we put was 11W, and the new starter can work with lamps in the range: 4-80W.
Now replace the new tubing to its place!