Hi there, was wondering whats the most future proof lightbulb you can get (not taking about fire  which is the easiest source of light to create )

Thinking a bit it seams that carboon arc lamp is the best one, although you need to replace carboon in it everyday, it seams since it uses carbon (which is found in batteries, pencils and everyday items) its the easiest to fix and maintain

Incondecent breaks and requires special machines and knowledge about working with glass to maintain and reseal so unless someone makes it or repairs it for you (which suprise, suprise is banned) you are out of luck (not sure why but never found any tutorial on how to make or even repair one at home)

Flurescent tubes could be maybe made at home (if you know how to make neon signs and have knowledge about working with glass), but again requires special machines, also not sure how to make/where to buy the white powder that converts UV to white light

same with all types of HID lamps (Mercury Vapor lamp will probably be the hardest to make, since getting raw material for it (mercury) is not possible since its banned and dangerous

and the more modern we go the hardest it seams is to make/maintain your lamps (making LED diodes at home is again very hard if not impossible)

I did hear somewhere that in Russia there were attempts to make repairable incondecent lights (so you would just replace the tungsten inside and somehow reseal)

Maybe there are some more lamp types that use electricity and are essentially future proof, so you can buy one today, and show it to your grandkids and be sure that no matter what they will be able to use it, even if they will not be able to buy new one

Making DIY glow discharge lamps is entirely possible, and is 100% future proof. Just some simple starting materials are necessary. Glass tubing, dumet wire, or just copper wire thin enough, pure iron plates, some barium carbonate. Pretty much sure inert gases like neon, argon, krypton and xenon will be available anywhere in the future, vacuum pumps too. A little bit of metallic mercury, if necessary, too.

Though I suspect tungsten filament wire will be available for unlimited time, no doubts)

How about induction, the tube is easy to make with no electrodes, and the coils can be easily changed from outside (only in certain designs) without needing to reseal everything.

It may seem counter-intuitive, but it is notably harder to make a good electrodeless lamp at garage-level technology than a simple electroded one! That is because iron electrodes and extra activation material are working as a getter to capture residual reactive impurities left on the glass surface and in the filling, tolerating somewhat sloppy processing, some minor leaks in the filling manifold and non-ideal vacuum pump outgassing some oil vapor. The lamp starts dirty, but the color gets better after some aging. Within a simple electrodeless lamp, there is no getter, so processing/filling technique must be much more clean, long degassing in the hot oven under high vacuum, and even so the last stage of pinching off the filling tubulation inevitably involves heating the glass to the melting point and releases some residual gases left in the glass volume. That is why cheap 'element sample' ampoules with inert gases sold on e-bay and so, in fact are displaying awful spectrums when excited, showing lot of molecular junk, including nitrogen, water and CO2.