Philips Natural Light 50/100/150-Watt A21 household light bulbs produce three-different levels of light and are ideal for use in kitchens, living rooms, dining rooms, offices, family rooms, bedrooms and hallways. The bulbs have a distinctive blue coating that reduces dull light effects to bring out the true vibrant colors in your home. Philips household light bulbs can be used in open hanging pendants, table/floor lamps and ceiling mounted fixtures.