Yeah, the ones I used to see were aluminum and had a white jar so it was likely glass.
I had a black plastic one with a clear plastic diffuser that screwed in and had lines inside. It took a low watt plug in cfl and was rather dim. I ended up donating it back to Habitat but I kind of wish I kept it now.
You may remember a while back I found a white Utilitech version at Lowes recently in a very dusty box. I took it to the register to buy and it was from long enough ago it wasn't even in the system. They called a manager over who said I could have it for $5. Well, dummy me didn't open it, and while I thought I was getting a NOS fixture that turned up behind a shelf or something, what I really got was a box with a used coach porch light from 2005 with a hole drilled in it. You can imagine my disappointment.
