For me Crypts and Valisneria do well planted in sand, with moderate light, and no ferts.
I have also been able to grow Anubius and Java fern in low light and a few hand fulls of fluorite mixed into the sand
I had a few reef keeper friend that would switch bulbs out every 6 months or so and I'd take the old ones, that had plenty of juice left for fresh water plants.
Anubius above, java fern below
used bulb type below, in hardware store shop light fixtures above the tanks
I have also been able to grow Anubius and Java fern in low light and a few hand fulls of fluorite mixed into the sand
I had a few reef keeper friend that would switch bulbs out every 6 months or so and I'd take the old ones, that had plenty of juice left for fresh water plants.
Anubius above, java fern below
used bulb type below, in hardware store shop light fixtures above the tanks