Cant say I have tried it on a work light, but I have swapped to LED for my inspection lamps.
I find that the LED gives a less bright, but more diffused light, with little range (say 10ft). This could be OK for your scenario as I find that working under halogen/car headlight type light is problematic, wiht your back to the halogen light you get a lot of shadows so cant see what you are in front of. Facing the light you get dazzeled so end up looking down all the time! It also ruins any night vision so you end up either being able to see something that is intesley lit, or not at all.
I think that the more diffused, softer LED light my be better for those reasons, but can promise it as it may well depend on the individual reflector setup and positioning of light.