These heatballs are very efficient heaters within the house. As efficient as an electric heater/furnace. Even the visible light warms those objects it hits.
Also, toasters are light bulbs, but not very good ones. I’ve got one of these 1000 W bulbs in the kitchen. On dark nights, you can read by the weak orange glow between toast or bagels. Abe Lincoln would have enjoyed one of these as he studied his law books.
(Actually, electric heating is pretty bad. Since electric generating plants are roughly 50% efficient, you have already lost half of the energy released by the fuel. About half the energy goes out the stack at the plant. With gas or oil heat, you burn the fuel right there in your house with much less loss.)
“On dark nights, you can read by the weak orange glow between toast or bagels.”
You, sir, are a poet!