Shading CFL bulbs

5:09 pm in Completed Window Farms, electronic components, questions, Seeking Advice, Version 3.0 Modular Airlift Columns by David Sonenberg

I recently got my 2 column farm set up. I have to CFL’s hanging between the columns but have found that they are quite bright, and blind you if you look to close to them. I tried cutting up a plastic cup to just shade the back 1/4 of them not facing the plants, but the cups started to melt. Has anyone attempted doing anything like this, or have any ideas?