Response to Being that you have been using an R20 bulb then you likely do have a model that is compatible with the LED replacement bulbs but it would be wise to confirm your light model with either the Hayward Astrolite, Pentair Amerlite, or the Jacuzzi Full Moon. These are the models that are indeed compatible with those LED bulbs. The model of your light should be located on the label on the back side of the light.

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