i was thinking about trying to get rye LME for the rye content actually. just made the most sense to me right away. what if i get LME for both the rye and pilsen light? or would doing LME rye and DME light pilsen be fine?
Yes, that would be fine. That's what many do, mix and match.
[EDITS]
The link I posted earlier shows 3.3 pound plastic cans of LME. There are many varieties. That's what you usually get from the store, in kits, or mail order.
==> Make sure
not to buy pre-hopped malt extracts! They're packaged in the same plastic cans, but are a whole different thing, for a different kind of brewing that doesn't involve a boil.
For many, more commonly used LME varieties, such as Pilsen Light, Golden Light, Sparkling Amber, etc. the store may have large vats from which it fills their own containers, or thick, heavy duty food quality plastic bags.
You can use either DME or LME, and interchange one with the other freely, using this calculator:
https://www.brewersfriend.com/lme-dme-conversion-calculator/
Many extract and partial mash brewers prefer to use DME over LME, as it tends to keep better, years even when stored dry, in well (re-)sealed original bags, without affecting flavor and freshness. It may clump, even when never opened, it's still A-OK. It only takes longer to dissolve when clumped, give it some time, and keep stirring. But the selection/variety of DME is more limited than that of LME.
Then use LME where a DME variety is not available. For example, that
Rye LME mentioned before is only available in 3.3 pound cans. There is no dry (DME) variety of that.
Why not always use LME?
LME is like honey, it gets darker with time but also develops a weird old, stale-ish flavor. As long as you can get LME that's known to be fresh (check dates) it should be generally fine. You still don't know
how it was stored since manufacturing. Could have been in a hot warehouse for most of its life, until it reached your brew store shelf. Know your store, your supplier.
Any leftovers can be stored refrigerated in the original container closed with the lid it came with. You could cover the surface of the extract with a piece of tripled up plastic wrap or mylar film to further shield it from air (O2) contact. It should be used up within a few weeks, ideally. Perhaps even up to 2-3 months?