Yes, incandescent bulbs are not very efficient, in fact most of their energy is converted to heat and only a small portion is converted to light.
I have heard of anecdotal cases where people use incandescents to heat up their camps in addition to some other basic type of heating. Although that might be handy in a pinch, it is not the wisest choice for heating.
There are a few different types of incandescents available on the market:
Incandescents definitely have their place. Most incandescent bulbs can easily be replaced with high efficiency bulbs. However, there are few affordable, high efficiency bulbs that are comparable with some of the specialized types of bulbs, such as Xenon, or certain halogens.
All things considered, LEDs are the new runners up and will surpass incandescents as specialty lighting, once they become affordable.
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