Planted plus are great lights. I run 2 on a 15 gallon and 1 planted plus and 1 ray 2 on a 40b. I like the light to be bright so 1 light might be sufficient for your application depending on your needs.
Low light, get regular fugeray. Had 1 on a 12" cube grew plants slowly even with CO2
Low-med get planted plus, have 2 on a 20L and replaced my 12" fugeray (have a large piece driftwood that blocks light so I got a 2nd to get better coverage up front.
High get ray2 (don't have these but I know the other 2 won't give you really high light)
If you have a wide tank, you may want 2 fixtures or find a way to lift the light for better coverage.