How can I reduce the brightness of stained glass?

Okay, now I understand your previous question. How about opaque window film.? Or, if you don't mind something harder to remove, opaque contact paper. If there is an outer storm door to protect it, you could put the film on the outside, or even the inside of the storm door. I like stained glass, but home associations can be tough. Good luck!

P.S. If it's real stained glass, would you consider relocating it so it isn't so visible, but, where you can enjoy it?

I am not sure if window film will do the trick to make your HOA approve of it...but you can try it.. window film

Frosted spray paint. Frosted contact paper. Whitewash with a 50/50 mix of white paint and water.

Hello. Frosted contact paper or a spray frosted glass aerosol could help dull the design.

Condo Commandos strike again! Yeesh....

What if you relocate the outside light, or put a diffuser over it, or lower the bulb brightness?

I would remove the stained glass frame it and hang it from hooks in your ceiling either in front of another window (inside) or lamp. Get something they approve of to put inside the opening of the door and be done with them. Enjoy the stained glass by yourself lol! 😎

Check out a static cling privacy film. I've had great success with rabbitgoo brand.

Ok, I am a little confused as to what side I am looking at and which side you want to dim down. Do you not like how bright it is. Are you referring to the light that is going through the glass or the brightness bouncing off the glass from the light. I'm assuming the brightness coming through the glass. I do stained glass so I am trying to figure out the best option. Film will only work if there is another glass pane on the other side that is flat.(Basically the stained glass sandwiched in between 2 panes of glass). It won't work if you are trying to put a film up against the solder seams. This will result in a film with a ton of creases and folds. I am assuming if you are dealing with a community board this would be a temporary fix. A temporary spray sounds like a good option if you are able to scrape it off when you leave shop. Also, you could always do a roller shade on the inside if this is providing too much light coming in and is a problem at night. I have also seen roller shades for outside use. If you can describe the problem you are having better, we might be able to come up with an easier fix.

Could you cover it with translucent plexiglass? That would tone it down, but still let some light and color through.

You could also use window film, Amazon has tons of different types.... I would suggest a semi-opaque privacy film for the outside..... https://www.amazon.com/s?k=semi-opaque+privacy+window+film&ref=nb_sb_noss