When I was at school in the 1960s, my very first mechanical "8-line" Nipkow television used a torch bulb as a light source. No, it never worked properly but this was before I'd ever heard of things like equalisation. Light bulbs had the advantage of being relatively bright compared to my little '90v' neon indicators and of course there were no LEDs in those days.
I wonder how fast you could effectively modulate a tiny pea bulb of low thermal capacity by using some DC bias and successively boosting the higher frequencies? What sort of phase delay characteristic would have to be applied to the equalising? I would guess the blue component of the light would modulate faster than the red, and a lot faster than the infra-red (heat).
Maybe it would then be fast enough for an 8-line picture?
Steve O