Can I paint glass light pendants?

Krylon makes a stained glass spray paint that I would think would do a good job. If spray painting isn't your style then any glass paint should work.

Chalk paint is an excellent choice for painting glass with limitless color choices. You can even get a crackle effect, if you like that. There are many posts here on Hometalk, not only on how to make your own chalk paint, but how to paint glass and how to get the crackle effect. You might even consider adding some bling.

Fusion or chalk paint would work great. Please post pics after you're done.

I used glass paint in any craft store and blotted the colors together to make a sort of marbled effect. colors were oranges reds browns yellows... my room is a more red oriented color. It reminds me of an impressionist painting.

Glass paint can be set in oven.

Before painting I would check and see if you can take them down and apart then see about cleaning them. I f its paint that has dulled see if you can remove it , if its just grease build up I would seriously clean them before doing any painting to them

There are many options with glass paint . look in hardwear stores you can get an idea what available. see what you like best .

Here's a post that might help - https://chascrazycreations.com/painting-glass-diy-guide-and-tips/