Philips 451906 19 Watt dimmable AmbientLED A21 replaces your standard 100 Watt incandescent, providing you with up to $222.75 of energy savings over the life of the bulb. It has an extra long lifetime of up to 22.8 years, reducing the hassle of frequent light bulb replacements. This standard A-shape LED is ideal for household use in bedrooms, living rooms, dining rooms, and hallways. Philips A-shape Dimmable LED lamps are the smart LED alternative to standard incandescents. The unique lamp design provides omi-directional light with excellent dimming performance. Philips LED’s use less energy than other types of light bulbs, are environmentally friendly, safe and mercury-free.