fish dont need high intensity, which IMO leaves only spectrum, fancy features and durability. I used to use the marineland fixutres, current strips, even older radions on mine.
Cheap chinese ebay 14,000' Kelvin (14k K) are nice. I feel fish prefer dimmer light and colors come out better under a little blue light. Ive had 7k & 10k, both looked a little yellow to me. Use a color wheel and whatever color you shine on them, the opposite color will come out more, or something like that.
Then sometimes you might want features like clouds, thunderstorms, & phasing moonlight. I know, theyre only fish & this is the forum for 99 cent store setups (no offense), but please could someone here go nuts/all out and impress us (thats not a for sale thread) ?!?!!
Of course cheap LEDs dont last or have fancy stuff but still come out cheaper after repeated replacement in the long run, IME.