Electric lamps have no uniformity of temperature on the room in question, similar to the lighting provided by a neon office light for example. The lamp does not control the temperature of the substrate, providing a mix of warm and cold areas.
Electric lamps require a lot of maintenance and are not allowed to be used in a place with solvents and / or paint shop because they present a danger for fire or an explosion.
The only advantage of electric lamps, they are not expensive. But in return, they do not work well with liquid paints.