The question is always easier and much shorter than the answer. And the answer always comes with a lot of additional questions. For a start.. If you want to go cheap and sufficient you need some DIY skills and basic knowledge in electricity. Having this and depending on it you have a pretty wide range of different options to go with from advanced High performing low voltage RGB setups on a programable controller to straight forward AC powered setups. My advice in this very fast evolving led era keep it simple, pragmatic and low budget as possible.
I made quite a few diy light setups for open top tanks till know, but i have little experience with DIY light setups for hooded tanks. The first thing that comes to mind is in what design and from what material is the hood constructed, how much space (height) do you have available between hood and glass cover panel?
For the people with the least skills and DIY inventivity i would advice the easiest straigh foreward AC powered r7s replacement dimmable cob led units.
https://www.ukaps.org/forum/threads/new-flood-light-project-commin-up.57756/
This is the most straigh forward and simple you can make today with led units. Its the same as connecting any other AC light bulb or T5 instalation connected with a Live and a Nutral wire pluged into an ordenary household manual dimmer and timer switch on the power socket.
If you don't have space enough available to mount such a complete flood light under the hood.. Than you need to come up with a safe diy construction yourself to mount the r7s lamp base in it with a splash water tight cover.. This i can not advice on, beause i would need to see the hood myself in person.
https://www.ebay.com/itm/R7S-78-118...hash=item1efdecf4b4:m:m7orCexRs9RubTdgn9l2JSg
In the thread above a i elaborate a bit on a programable controller on these units making it look advanced, but that's not a nessecity but more a luxury expence you can skipp.
They come in different models, size and wattage, than with the use of a dimmer go high end on the wattage/output and you can always make it less as you wish. Always beter than starting out with not enough. The strongest i could find are 50 watt, i guess that's about the limit they will have for now higher output probably will run to hot. Currently i'm running the 25 watt versions myself and it performs pretty good and stays pretty cool to the touch.
https://www.ebay.com/itm/1-6X-Dimma...var=591961524051&_trksid=p2057872.m2749.l2649
https://www.ebay.com/itm/Free-shipp...hash=item4b465c0d08:m:mnEBD5q8_l21i7HgImq5dGA
www.aliexpress.com/wholesale?catId=0&initiative_id=SB_20190807011003&SearchText=Dimmable+LED+R7S+&switch_new_app=y
The good thing is, along the way led technology still evolves rather fast into beter performing units and designs. With this you can always replace the bulbs in the future without the need of a total rebuild.