Chenghe Elex 40270 - CH40-120B-FML27 Compact Fluorescent Ballast

These work great but one thing you need to know as the wiring scenarios with these if any may not apply to your lamp. If the ballast is in the base of the lamp, remove it, cut the leads from the lamp head where they attach to the old ballast. If you ONLY have 2 wires coming down from the lamp head, you must twist the two red wires coming from the new ballast together and attach them to one of the lamp leads and twist the two yellow wires coming from the new ballast together (or what other colors are the same) and attach them to the other lead. If you do not do that on a 2-lead lamp header, and attach only one wire of each color, you will not have enough power to start the bulb. Of course, they don't tell you this. If you don't have a ground lead, just attach the lead to the case or cap it, as a lot of these floor and desk lamps do not have a grounded plug (or you can change the cord too if you want). In my case the old ballast was in the base of the lamp. After I removed it and did the above, there was plenty of room for this new ballast to fit.

It's expensive for what it is, but it works. What can I say? It saved my wife's task lamp from going to the recycler's. It appears the task lamps that have the four CF-tube light source all are made with piss-poor ballasts. Changing the ballast to a new one should make it last longer.

I bought this ballast to restore a FLM27 table lamp pair where both ballasts went bad (I traced to the start circuit). The original ballast would blink, flicker, then light the tube. This new unit is instant-on, no blinking or flicker.This unit is competitively priced and physically very compact.My next project will be to retire the fluorescent tubes and replace with LEDs.

All I have to do yet is either order a new FML socket or solder in the old one. I’m leaning toward getting a new socket since all I’ll have to do is tin the new wires and inert them in the socket.UPDATE: I finished and it works better than it originally did. I was able to remove the wires from the FML socket, tinned my wires and inserted them in the socket.

Works perfectly with my 27W CFL floor lamp. The lamp suddenly quit, found that the bulb was fine. Very happy that I found this replacement ballast, so didn't have to send the rest of the lamp to the landfill. Reconnected to match the wire colors of the old ballast using closed end connectors.

Replaced old Ballast with your product. Worked great, and nice wiring diagram. Thank you.

Didn't work, waste of money for shipping, still don't have a refund. $10 cheaper elsewhere.

Very good option to save that nice old lamp you want to keep. For a diy average guy easy to install, to my application was a bit smaller that original but once cables got secure together lights up nice as new.