Not sure how much PAR you will lose with glass vs. acrylic but the tank will run a bit hotter due to lack of evaporative cooling. This can be good in the winter, not so much in the summer. Our tank came with a custom glass lid and the cleaning of the salt creep alone was worth switching to DIY screen lids (there's a center brace so we built 2, one for either side). Ended up using 1"x2" pine from Home Depot and some 1/4" mesh screen from BRS. Just tacked it to the bottom with tiny staples after screwing the pieces together. Had to add corners for our HOB overflow on the left and our return plumbing that comes up over the right corner into the tank (it's not drilled). These old photos are from back when we built our lids:
View attachment 44253
View attachment 44254
If you decide to build a lid out of wood, a chop saw and these 90 degree clamps make it pretty easy to get the corners perfect:
https://www.homedepot.com/p/BESSEY-...Clamp-with-1-2-in-Throat-Depth-WS-1/204958409
Also, pre-drill your holes to prevent splitting the ends when you screw them together.