The International Dark-Sky Association (IDA) is a non-profit organization that educates and promtes the reduction of the effects of outdoor lights on the night sky by reducing the night time glare caused by outdoor lighting fxtures. The Great Outdoors Dark Sky lighting complies with IDA standards. All meet UL or ETL standards for wet locations. The Great Outdoors Mantiel, or "Mantel" Collection: a distinctive selection of aluminum outdoor wall mount lighting fixtures. Features Aluminum bowl / dome shade hand-applied powder coated finish Sand Coal Black body / Sand Coal Black shade outside / Glossy White inside Sand Coal Black body / Sand silver shade outside / Glossy White inside Requires (1) 100 watt max medium base (E26) bulb ETL rated for wet locations Dark Sky IDA approved 1 year manufacturer warranty Dimensions Height: 9-3/4" Width: 10" Extension: 11-1/2" Product Weight: 1.2 lbs Backplate Height: 1-1/8" Backplate Diameter: 5-1/2" Electrical Specifications Bulb Base: Medium (E26) Number of Bulbs: 1 Bulb Included: No Watts Per Bulb: 100 watts Wattage: 100w Voltage: 120v Compliance: ETL Listed - Indicates whether a product meets standards and compliance guidelines set by Nationally Recognized Testing Laboratory (NRTL). This listing determines what types of rooms or environments a product can be used in safely. Dark Sky Lighting: Known as Cut Off Lighting, or Friendly Lighting, Dark Sky refers to lighting fixtures that reduce excess lighting and reduces sky glow to eliminate wasted energy allowing the night sky to shine.