How do I make my outdoor lights emit red without changing the bulb?

In my film class, our professor mentioned some type of fiberglass gels that you use to change the color of the light. However, I don't think I heard him correctly and now someone wants to put it over their outdoor lights to make them red for the holidays. I'm pretty sure I have the correct material (the woven fiberglass) in mind, but I just want to make certain. if this is the incorrect material, what else can I use to put over my lights as a gel to make the light reds.How do I make my outdoor lights emit red without changing the bulb?yeah ur right its the woven fiberglass

i also did this for the holidays
How do I make my outdoor lights emit red without changing the bulb?
saran wrap makes red wrap for easter and christmas. You can put it around the light fixture, just not against the bulb.
How do I make my outdoor lights emit red without changing the bulb?
you can purchace gels at theatrical lighting stores. Rosco and Lee are the 2 main manufacturer/dealers. you'll find them easily online.