Walmart offers the Intex Multi Color LED Pool Light Sprayer, model no. 28089E, for $14.99. (Sears has it for the same price.) Opt for in-store pickup to avoid the $4.97 shipping fee. That's the lowest price we could find by $10. It luminates in four colors, features a built-in hydroelectric generator, and requires a pump flow rate of 1,000 to 3,000 gallons per hour.