Electrical/light bulb question

I’m in the process of setting up my seed starting area, and trying to figure out lighting.  I have a batch of small light fixtures that I used to use for my fish tanks, that all say to use type A bulbs.  Which is the “normal” type bulb.  Which is all well and cool….but looking at bulbs that come in the right type of light needed to grow plants and what not, can I put a PAR bulb into these as long as the bulb itself otherwise fits and I don’t go over the recommended wattage?  It looks to ME like they’re the same kind of base, but I hate to assume when it comes to electrical stuff…..