Kind of unusual equipment, but equipment non the less.
While all of us enjoy observing from the darkest sight possible, we can't always just load up and head out each time we may have some time to observe. My semi dark site is a 30 minute drive, the very dark is 60. Many evenings I want to spend some time observing without the drive (falls under the subject of domestic tranquility). I attempt to do as much as I can to even the odds against the LP fight. I have Bortle 6 skies at my house, along with a very pesky streetlight. Two of them actually, but one is REALLY offensive. There are also porch lights and skyglow around the neighborhood.
I can set up two, four, or all six, depending on what direction I want to view. Once I get them set up late afternoon, along with all my viewing equipment, I can then sit behind them for extended periods and give my dark adaptation a fighting chance over continually having to look at those light sources. For me, I believe it really helps, especially after the first hour.
The other benefit, IMHO, is it keeps my eyes looking up, meaning I get more observing time and I also become more familiar with both the sky and my equipment. Always a good thing. While doing all this is certainly no replacement for dark skies, I believe, for me anyway, the benefit of doing so FAR outweigh the alternative of not observing using the light pollution excuse. I also believe it helps my ability to see objects I would not see if I observe with a blaring streetlight in my face. They do block light. I use #10 duck cloth, PVC and ensure to drill the joints with screws for strength. I pound 36 inch metal stakes with holes in them used for cement work between the panels and zip tie the stakes to the panels and then zip tie the panels together up top. High winds will hamper their use, but overall they are quite sturdy and can be easily torn down. They are very light. I have even transported two to my semi dark site to block out any errant headlamp that may get nosey.
Nothing is better than darker skies, but doing what I can to help my ability to see is worth the time and effort, again, for me. I hope some find this approach useful. This is my second round of building these. The first go was 15 years ago up in Alaska. There is a thread with info about costs, materials etc. in the Best Of Beginners forum under light panels from back then for anyone wanting additional info.