Response to Hi Ed, Yes this bulb does fit into an American Products 7810xx needing a 100W, 120V, R-20 Bulb type. None of the LED Bulbs work on a dimmer so you would need to replace with a standard switch. Another bulb I really like and that will work in your light fixture is the PureLine PureColors LED Replacement Bulb. When replacing your bulb you will also need to replace your American Products Lens Gasket.
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