EMOYSTERL is a 20-watt LED emergency oyster light perfect for stairwells and apartments. It has an understated opal PC cover that blends subtly into architectural settings, and offers high light output with low-glare. The high-temperature LiFePO4 lithium battery is reliable and environmentally-friendly. And you also have the option of a built-in microwave sensor that triggers the emergency oyster light when appropriate. Like all our emergency lighting products, EMOYSTERL has been designed with a large terminal block enabling quick and easy installation.