Light is going in the center pointed away from house
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I'm going to add a second light to the spa.
LEDs don't give off enough light IMHO. I have 2 in my main pool 15k gallon and one in the spa. Worth the extra expense. Otherwise, I would go with a single standard light and orient it from the deep end to the shallow end. Clink on the link in my sig and look at the 5th or 6th pics. You can see that on either side of the lights, it's somewhat dark (along the stairs closest to the house). With one light, that dark space would have included the entire shallow end.