LED bulbs are great. They weren't before 2010 or so, when they couldn't color-match incandescents, but both that and the price issue are solved problems.
Less than 1€ a bulb, that is not too much more than standard indecent bulbs... You can get them cheap enough from deals.
[1] https://www.fs.usda.gov/about-agency/newsroom/releases/usda-...