70 year old recess light

[sparkync]

I have a customer who needs the tubes changed in an old recess light fixtures. It is a 1x4 wirh a glass lens. I can't figure how to get into it, without taking rhe whole outside of the frame down. If I do that it will take two men, since it's going to be heavy. I'm trying to send a picture of it but haven't figured out how yet. It says "file is to large". It has a small piece of metal going horizontal half way of the length. It has a "thumb screw" in it, which I tried to unscrew, but it stopped about 3/4 inch out. I was afraid to "force" it anymore just in case it wouldn't go back in. With this crude information has anyone seen anything like it? Homeowners says it's 70 years old.
I know, without a picture, you would have to be psychic., thanks anyway.

 

[hillbilly1]

When you select the picture click on options or file size, you should get a prompt that you can select the file size, click on small or medium, and it should go through.