"Around pools" is a subjective thing. If you mean >10' from the pool, just about anything will work but within 5' the only lights I know of are the ones listed for use "in" the water. In the 5-10' zone lights must be GFCI protected and I have not seen a low voltage GFCI protected light. 680.22 does not make any distinctions about low voltage. The usual option I see is fiber if you want deck lighting next to the pool.
