Hayward PRX9513 ProSeries Niche Flange For Underwater Lighting ProSeries™ SP120/SP300 Lights. Add a new dimension of beauty, enjoyment and safety to any pool or spa. Hayward ProSeries Lights offer a level of quality and versatility that you expect, at a price that gives you the value you deserve. ProSeries Lights feature an attractive European designed face with easy disassembly for simple relamping. Suitable for concrete or vinyl pools.