Alternative heat source. What are your views

[Ascended]

What are your views, either way. I am willing to learn.

I used to use Blue old style incandescent tungsten light bulbs to heat my tanks for King, snakes, Milks, rat snakes and corns, and others with similar heating requirements.

Bulbs a the hot end. And before you panic about burns. These were 25w blue bulbs on a dimmer stat. Even at full power you could touch them without a burn.
With them dimmed there was little light and they were even cooler. But they did the job of maintaining the temperatures and providing a hot spot.
Also with the lower voltage from the dimmer stat they were cheep to run.

Another benefit was that the old incandescent tungsten bulbs were deliberately designed to burn out at full voltage and fail so you would have to buy a new one, making the bulb manufactures more money.
But with lower voltage going through via a dimmer stat they did not burn out. I still have bulbs working after 25 years. (look it up, it was a deliberate built in weakness to make more money, (try searching the everlasting bulb)

Also the dim blue light was pretty, and with a dimmerstat with a night drop, hardly any light at night. More like moon light at night.

I am thinking to use this system again, obviously not for higher temperature requirement snakes.

Edit: the tanks were melamine chip board and stacked together for heat conservation.

Any views.