I have six of these that i use as floods for a
cyc. I modified them to allow the use of colour filters and to improve the cooling. If you put the filter direct onto the glass at best it melts at worst the glass will shatter - experience speaking here. The method that worked for me was this:
open the light and temporarily remove the glass. Permamently remove the cage. I then got a rectangular heating duct
cover (8inch by 12 inch or similar) from home depot. I then measured the openig size on the front of the light -
mark a rectangle of the same size on the heating duct end plate in the centre. Cut out a hole 0.5 inches smaller than the rectangle you have marked out. Now cut the extra 0.5 inches of metal into tabs all around the opening. Place this on the front of the hinged light front.
Bend the tabs around the hinge front so that they permamently hold the metal duct end onto the front of the light hinged front. Next you need some aluminium U
channel from Home Depot. Cut four pieces so that they go around the opening on the duct end. Drill vent holes in the bottom of the U
channel to let the heat out. Attach the U channels (laid on their sides) to the duct cap using pop rivets. The next step is to make colour runners. I bought some of the three inch wide drape
track that slides inside drape toppers at a thift store. This is the stuff where it is in two sections one slides inside the other to make adjustable lengths. I cut this along its length to make a J section. I then riveted this onto the U chnnels to act as colour frame runners.
I sized this to a standard colour frame size. Paint the new metalwork with high temp paint. Re install the glass after making sure the bent over tabs are snug - I used a large screw
driver to tap them in. The whole thing will
swing back into place and can be secured using the original screw. A working flood light for about $20 and 30 minutes work.
Sorry the instructions are not great if I can I will borrow a digital camera and upload a picture. I have found that primary colours last as long in these fixtures as they do in other
cyc floods. The light distribution with lights I have is nice and even.
Hope this helps
I saw a mention of
Gel - I still have some of the
strand cinemoid it was discontinued at the end of the 70s because it couldnèt cope with the heat of the
halogen lamps.