Foto&Tech 42 Watt Daylight Fluorescent Photography Spiral Light Bulb 6500K 120V White for Photography and Video Studio Lighting (2 Pack)
Brand: Foto&Tech
High quality and designed to last. The natural light bulbs for photography are nice and bright, runs on 42w 120v 6500k with CRI Rating > 80. They are eco-friendly and save energy consumption up to 80% in your household. Easy to recycle. RoHS compliant. The photo bulbs come in a spiral design, making vents generate less energy to keep them cool. Average lifetime is 8,000 Hours.
E26 versus E27:
E26 stands for 26 mm and the E27 for 27 mm in diameter.
These two standards are interchangeable, meaning a US E26 will fit in a European E27 base, and E27 will fit in a E26 base. The only difference is the voltage (for light bulbs). They are virtually identical.
An easy reference for which light bulb type is used in major markets is as follows:

United States - E26 Edison Screw
Canada - E26 Edison Screw
United Kingdom - E27 Edison Screw/B22 Bayonet Cap
Europe - E27 Edison Screw
Australia - E27 Edison Screw/B22 Bayonet Cap
Japan & Taiwan - E26 Edison Screw

Specifications
Style: Spiral
Screw Base: Regular Edison E26
Product Dimensions: 7.3 x 3 x3 inches
Product Weight: 7 oz / each
For Photography Lighting - The 42W, 120V Daylight Photographic Light Bulbs from Foto&Tech is a spiral, compact fluorescent lamp with Daylight temperature of 6500K and an output of 2500 Lumens. CRI rating > 80 indicating accurate color rendition that makes it a good choice for photography, video light, or general use.
Long-Lasting Use - High quality and designed to last. Each 6500k photography light bulb is bright and natural with a daylight-balanced tone. Average lifetime is 8,000 Hours.
Fits Perfectly - The studio lights have a standard E26 size, a US Edison (medium) base, and will fit most lighting fixture sockets. They also are compatible with E27 (EU).
Energy-Efficient - Eco-friendly and saves energy up to 80%. RoHS compliant and recyclable. The photography light bulbs come in a spiral design, making vents generate less energy to keep them cool.
Multipurpose Utility - Work great for other projects like photography lighting, filming, and promote growing indoor plants. They can brighten rooms inside homes and provide a difference in the atmosphere.