I love lower cost searching, NOT A thing wrg with it.
Not trying to snap but you also have answers at the AC forums as well.
From Prober "Don't go crazy with the light unless you want to spend a ton on co2. Too much light and you will just get algae. That was a real nice light you found but you probably don't need four bulbs."
MoonstruckMuse "You definitely don't need super high light"
Coach "A standard T5 normal output (T5NO) bulb should be more than plenty on the 29. a standard T12 bulb would suffice on the 20 long" And just so you know I put Coach in the top 3 knowledgeable members when it comes to planted tanks.