Faking Stained Glass

For my final project I'm planning on having a scene set in a church that is fully engulfed by the lights from stained glass. I've had this image in my head for a while, but am unsure how it will be executed. I've been trying to do some research online and so far haven't been able to find anything about how these lights are achieved. I have plenty of reference images but not many from films that I can find. I'll be doing more research into this but until I can find some I have some plans that I will be trying to get this effect somewhat right. 

Gels

Having used gels for my original concept video, it became clear quite quickly that using gels over standard lights only gave a slight wash of color over the scene that could then be colorgraded to be more saturated. I think one of the main suites with this is how thin the gels are. Hopefully having thicker gels will allow for the lighting to be more saturated. 

Another issue I think this will present is the fragmentation of colours. Having the brightness of the light and saturation of color at a level that looks realistic will already be difficult, but having several colours at the same time will also be a challenge. Once I've found gels that are thick enough to work for this, I will then try to cut them up and have small black outlines to keep the colours somewhat seperate. 

If this approach doesn't work I will have to consider the use of multiple lights for each colour, which isn't very effective time wise and based on resources, but I will try with one light per colour to see how this looks. As seen in the pictures the lights don't have hard edges but blend in and out of each other, and in most cases are very saturated primary colours.  In my experimentation I will be trying out as many different gels and colours as I can to see which ones show up best on camera. 

Digital

Another aspect I'd like to play with is the rays of light that may shine through the scene. I've seen some colorgraders who use DaVinci Resolve to create an effect like this completely digitally, and would like to look into this. From what I've seen all of the effects mentioned above may be doable using exclusively computer generated lighting, but I would like to try it as a practical effect first before trying to enhance it using DaVinci. 

I will be trying out some of these ideas hopefully over the reading week, as I think I might need a completely dark room to make this work so I will try and find somewhere suitable.