As an example, in the UK, per kWh of heat, natural gas is about 3 or 4 times cheaper than electrical resistance heating, never mind about half the CO2 emissions (190g vs 430g typically), so heating by light bulb is many many times less effective and more environmentally destructive than the most common (natural gas) alternative.
Plus gas central heating puts the heat nearer the ground where it's needed and delivers that heat better.
Other then for very specialised applications such as incubators and some hot foot displays for example, if you want light get an efficient light sources such as CFL or LED; if you want a heat source, get an efficient heat source such as natural gas or a heat-pump. Don't use an incandescent light bulb which is neither.
Rgds
Damon[ Parent ]
