How to Use Burnt Compact Florescent Light Circuit Module




Introduction: How to Use Burnt Compact Florescent Light Circuit Module

Note and precautions: CFL's contain mercury which is hazardous material, so it should be handled accordingly
Most CFL lamps, electronic circuits are working perfect and are still useable, only the bulb goes defective. CFL circuit of 18-24 Watts are useful for the activation ofreplacement type two feet 18-20 Watt Florescent Tube Light bulb.

Step 1: Find a CFL

You will need a CFL as shown in picture. Any CFL of which bulb is defective, broken or has outlive its life is useful for this modification. Drive voltage may be according to your country 110 Volt or 220 Volts. In my country (Pakistan) voltage standard is 220/230 Volts.

Step 2: Disassemble

Disassemble the CFL as shown in the picture. Note there is a single pair of wires/connections which goes to the 110/220 Volts. other side has two pair of wires 9four wires) these will be connected to the replacement type 20 Watt 24" Florescent Light bulb. After disassembling you will need electronic module from it. Check carefully there are no burnt parts on it. Using multimeter check its diodes, fuse etc. some time fuse is found melted you can replace it or bridge with a very thin copper wire.


Step 3: Parts Required

You will need a replacement type Florescent Light bulb of 18 or 20 Watts type and hardware to hold the tube bulb and ofcourse salvaged electronic module from the CFL.

Step 4: CFL Module Wiring

Rewire appropriate length of wires as shown, say about 4 to 6 inches.

Step 5: Mounting and Assembling

mount the parts and assemble. Note the CFL module shold be mounted on an insulated plate. I used a piece of Plexiglas and fixed the CFL module with a hot glue on it. For extending connections, use terminal blocks.

Step 6: Connect to Light Up

Now after assembling check all connections taking care there should be no loose connection. Now power up!!!. I have assembled three such units successfully.



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99 Discussions

hi. I have lcd monitor with inverter problem. Can it work with ccfl lcd backlight? Thank you in advance.

Can a 15W cfl electronic module be used for 9W 2-pin cfl? If yes, which of the two pairs (4 wires) of module to be connected with one pair (2 wires) of cfl? Thanks in advance.

you can use upto 65 w cfl or pl circuit for 40 w tube only .... for bright light than 40w

Some time wattage are written fictitious. The transistors used in the circuit may reveal actual wattage. You can replace it with a 20 watt tube lamp.

Great !dea .... but for me i make use of burned out CFL by using its top as adapter for bulb holder.

I found CFLs are bad for lighting house. Earlier i used to replace Tube-light fitting with CFLs. But soon i realise that the light emitted by CFLs are not good for reading & doing jobs. More over CFLs cant be used for hand lamps for doing jobs as the light emitted by CFLs lack penetrating property in the darkness. In other words "CFLs are big failure". Light emitted by CFLs goes on deceasing with the age of cfl.

On other hand i found LED lights excellent. I now replaced my CFLs & Tube fittings with LED lights, by which i m getting excellent result.

I prefer 21 Watt LED tube light is enough to brighten 130 - sq feet room. For larger rooms , 2 or more tube light can be fitted. LEDs have very long life.


I opened up exactly such a Philips lamp today (in South Africa) and it is pretty similar instead of the rectifier bridge on the bottom of the board, this one has 4 x 1n4007 diodes and a 3.3uF 400V electrolytic capacitor (4.7 in your image). Inspect that capacitor carefully. On mine it is bulging slightly, indicating that it's probably cooked a bit. I suspect it was cooked by the lamp heat, as 400V should be more than sufficient for the 325VDC (remember, 230VAC is RMS, peak will be higher). If the cap is bulging, don't use it.

do i need to connect the tubelight starter along with the circuit or just connect the circuit directly to the tubelight ?

hello all..

can i use 40w electronic choke to light up 11w cfl tube...

it is very tough to find 11w ballast in my town....

1 reply

40w will require at least three 11w bulb in series.

Can we modified the CLF (compact light florescent) circuit into induction heater circuit thank you

1 reply

Great idea.

A T2 8W tube lit up when connected to a 11W CFL, thereby proving the T2's ballast must be dead, and not the tube. A T4 6W also lit up on this CFL.


1 reply

Thank you. In my experience these CFL ballasts accept wide range of
lamps with light output variation. I usually use 23 Watt ballasts with 20 watt lamps.

How can we find what is voltage atviutput terminal?can we use is to make led bulb ?