T4 GX24Q-4 Triple Tube 4-Pin Compact Fluorescent Lamp. 42 Watt with Warm White 3000K or Neutral White 3500K color temperature, 82CRI. 3200 initial/2700 mean lumens. 4-Pin lamps are for use with dimmable electronic ballasts. Minimum starting temperature 14 degrees fahrenheit. Ideal for commercial applications, most commonly used in recessed cans, portables, ceiling fixtures, and wall sconces. Suitable for use in dry locations only. Not for use in totally enclosed fixtures. Average lamp life 10,000 hours. Length: 6.5 inch.