The government is considering an extra tax on energy inefficient light bulbs.
Incandescent bulbs contain a filament
Costlier compact fluorescent bulbs use a fifth of the energy of incandescent ones, those with a filament, and last much longer.
Chairman of the all-party group on climate change, Colin Challen, is asking the Treasury to gradually raise the tax until they both cost the same.
Making people switch would save them money in the long run and cut carbon dioxide emissions, Mr Challen argues.
The Treasury have said they will look at the Labour MP's proposal carefully.