I have a set of 113 patches from USCG, Police, Fire plus 7 Boy Scout patches each of which features a lighthouse. I stopped collecting them a couple of years ago.
All the patches are mounted on 8x30" black foam core board (with rubber cement - so can be removed easily and without damage.) These would look great in black metal section frames and hung around the top of walls in my office -- but I haven't bought the frames yet.
Here are some examples of the mounted boards:
US Coast Guard Patches
Police, Fire, EMS, Mounted etc Patches
Boy Scout Order of the Arrow Pocket Flap Patches
The Scout patches are the most beautiful patches I've ever seen. Very dense stitching with the name and year of the lighthouse included. They are limited editions, made a few years ago and no longer available. They picture the working lighthouses of North Carolina. Here are two close-ups:
Cape Lookout
Oak Island