PoolTone™ Standard White LED Pool Light 12 or 120 Volt 100 Ft 500W Equivalent Select Voltage:12 Volts LED Bulb has a mini

LED Bulb has a mini candelabra base which is the same as OEM quartz bulbs

The front of your fixture should look like picture below

Fits hayward star-clear and star-clear ii cartridge filter

so use a new OEM lens gasket at the link below:

and only on larger pools do you notice the difference at the furthest parts from where the light is installed

PoolTone™ Standard White LED Pool Light 12 or 120 Volt 100 Ft 500W Equivalent Select Voltage:12 Volts LED Bulb has a miniAvailable in 12 or 120 Volts with 100 Feet of cord Equivalent to 500 Watt Incandescent Stainless Steel Face Bulb rated for 50,000 hours We offer a 1 year warranty and units are fully serviceable Compatible with standard stainless steel and plastic niches Energy efficient utilizing up to 85 percent less energy than comparable incandescent lights Equivalent to a 500W incandescent Measures 11 inch length by 9 inch height by 11 inch width Niche