What a good/affordable led for a 6ft tank?

[dr exum]

if you wait until black friday petsmart has fluval aqua sky lights 50% off

 

[Supergeorge123]

If you only have duckweed you could use anything.

 

[FJB]

I use 2 3foot Finnex Planted+ on my 125g and have been happy with them.
I agree that having two shorter ones would make them more usable and exchangeable with other setups, than having a single 72 incher. But again, if it is just for frog bit, anything would do.