glass cover for cfl - advice wanted.

If I put a glass cover over a cfl light will it cut down on what the plant gets ? My grow is in a trash can and I leave it for a week some times. Plants grow up and touch the lights and I loose half of some leaves. last time one grew 3 inchs or more in the week, one side had burnt leaves.

I thought I would just use a jar, cut a hole in the cover, place light end though then screw jar on. The jar would be hanging off the light.


I included my basic setup .

It would work as long as your plants have air circulation. What are you going to do when you flower? The plants will double in height.

You could use uh... clear 2 liter bottles(maybe make some vents). Glass jars and fragile bulbs(with mercury in uhm)... sounds somewhat risky.