I made these lids on my 75g and rest cups, food, plants, etc on them. I used the 1/8th inch glass from lowes too. I would not trust them to holding my lights all the time because the plastic trim will eventually bow and give in. I think the glass would be fine, personally. Your lights are not very heavy and they have a well distributed weight.
My suggestion is to make a DIY conduit hanger for your lights, $10, and even paint the lights with high temp black paint. It makes it look pretty slick. Then you can use the glass for moisture barrier only.
To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.