Yeah those fixtures are total junk, none of them can really be recommended. I'd suggest you buy something modular so you can save money now but have the ability to add more later if you decide it's necessary.
For LEDs maybe consider Par38 bulbs, while good ones run close to a $100 each you could probably get away with 3 to spot light 3 areas of a 6 foot tank, then you can always add more later if wanted. You can also try cheaper bulbs and always switch them out later as well but as you can imagine that will obviously cost more in the long run. Either way you have more flexibility going a route like this.
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