The legs on T5 fixtures are adequate for above the glass but on those T8 strips
I'd put something uder the edge of it to raise it about 1/2 inch so air can circulate.
Most LED lights are too high for a 10g tank unles injected CO2 is used except for the Marineland Double Bright which was made before spectrum was recognized as important and they have the intensity but not the correct spectrum so most say they don't grow
plants or at least not well, but for a 10g they should be OK since it is so shallow.
One T8 bulb is enough for low light plants and some med light plants in a 10g tank.
If you are very careful/w which bulbs you use, two works well in a 10g. But use the wrong bulbs and you will get algae.
A two bulb shop light in T8 is adequate for lots of plants in a 55.
The light that I'm talking about is without CO2. Adding CO2 can/will bring up the light needs to a higher level. I use two T8 bulbs in one of my 10g tanks with little algae
on the glass...needs about two weeks before you need to scrape the glass.
No Excel/CO2 in that tank. But the other one has two T5 bulbs and needs Excel to have
just SOME algae on/in it...way overkill for a 10g.
Home Depot has a $29 shop light which is made from floor plate and chrome plated
but needs some type of skirt around it to help keep in the light. For the 55.
I have a custom glass cover on both my 10g tanks which is just cut glass a bit shorter than the tank so heater cords/air lines can go in. On one I just use two of the "Lights-of-America" strip lights from Walmart $8 each just placed on top of the glass but I do have a mirror glass cut 7" x 17" that I place on top of them also to keep the light in the tank. Doesn't look altogether Kosher but not horrible either.
That is a second generation wall covering which I like less than the first generation
of it. This tank will be replaced shortly but the light fixtures will be hidden in a DIY hood.