Who is wasting energy, Does the heat from an incandescent lamp escape from the house without contributing to the heating of the house
it's interesting you should bring out that old canard.
Do you mostly heat your house with gas costing 4.5p per kWh, or with electricity costing 15p per kWh?
If the former, why would you install twenty little electrical heaters in your house, and use them to heat the ceiling where the spiders live, even in summer when you have no need for heating?
And why would you install little electric heaters in your porch, outside your back door, and where you park your car? To warm the moths?