Your spots may be leaf miners, which leave silvery semitransparent membranes.

When you say they are under fluorescent lights, are the leaf tops a few inches away from the bulbs or are they 4-5 feet away? Like most Salvias, your babies need to be close, but not touching their light source. Extra humidity in low light will rot out the plants.

What are leaf miners?

As for the lights...the leaf tops are about 1 foot away from the lights. I can't get them any closer to the light due to the clear bags I have over them. If they were closer to the light, could I remove the bags? I will try any and all suggestions!!

UPDATE::: I got my magnifying glass out again and did another look at my plants. I noticed on the underneath side of the leaves that there is a teeny tiny grey/white bug that resembles a caterpiller(it moves pretty fast). What is this and how do I get rid of it before it destroys my plants???

This might be a mealybug, which is a sucking insect. The males resemble small mosquitoes. Swabbing with Safer soap on a Q Tip might work, if the infection is small.