This 4-pack of 25-watt A19 colored transparent red and green incandescent medium base party light bulbs is perfect for adding a festive touch to your holiday decorations. Each bulb has a standard E26 medium base and provides up to 1,250 hours of light on average. The bulbs have a maximum overall length of 4.25 inches and a bulb diameter of 2.38 inches. They are dimmable and perfect for creating a fun and festive atmosphere. Add a touch of holiday cheer to your home with these red and green light bulbs.