Initial cost of t5ho is good, can mix and match bulbs to change spectrum/appearance and the diffuse/bounced lighting is much > than any but the craziest of led arrays.
It's probably kind of a pain to cover 24x24 with a single bar/strip led
I personally think current USA lights are overpriced at the moment in that they're more expensive than the fluvals which have better control options/phone app. kensfish.com has 15% off fluval lights with coupon code "fluval" since like a year now...
honestly like the chinese black box you pmed me is probably way overkill for a 30g low tech tank, though those lights can be run at like 20% and should last longer that way... and you could probably more easily light the whole tank vs a single current or fluval or whatever.
The agromax would probably work, but since it doesn't seem you care too much about the appearance of the lights you could always try a pair of 24" beamsworks with s2 pros or something for ramping/schedules.https://smile.amazon.com/Beamswork-FSPEC-Aquarium-Light-Freshwater/dp/B01LFF07BU
erm just search for s2-pro on ebay or aliexpress theyre like 13-15$... alternatively you can just use a timed outlet, or can use a TC421/420 fairly easily.
edit: Erm I see there is gonna be w/emersed stuff so maybe you should focus on the lights that are easy to hang?