2D 55 watt bulbs with 5000K are different from circular bulbs in that they have a more rectangular shape. If you have a lighting fixture that has these, you won't be able to use any other kind of bulb in it's place. It's a really unique bulb and comes in several wattage although the wattage are not interchangeable. The color is a full spectrum white color temperature appearance so it works well in homes and businesses that want something that's close to an incandescent lighted appearance. It's used in many lighting fixtures that have a low profile and people want to keep them out of the way whether it be a ceiling or wall mount situation. The 4 pin socket connection is unique and is only to be used with this type of bulb.

Product features:
- 55 watts.
- 5000K neutral white color.
- 10,000 hours.

- GRY10Q base.
- 4 pin socket connection.
- Operates on an electronic ballast.