Making Interior Lights Red FOR FREE!!!

I was playing around yesterday and i was gonna buy some LEDS but i dont have the money and they're a pain to wire and stuff. so i realized that on my floor board dome lights there are these little caps over them. I took those off and sanded them down a tad. Then i proceeded to spray some light coats of duplicolor onto them. When i put them back in, sure enough they lit up red. Idk if you guys would like this but let me know what you think. I like the dim lights instead of bright ones and they look pretty cool red. Idk how well it would do with other colors but its worth a try.