Feature: 1. Great Brightness: The battery powered work light bulb comes with adjustable brightness of 5500‑6500K and 350‑1300lm, offering bright lighting. 2. Standard Designs: The E27 12V 12W with standard threaded lamp holder also has a battery adapter, making the using and operation much easier. 3. Matching Battery: Suits perfectly for 18V BL1815 BL1820 BL1830 BL1840 BL1850 BL1860, and the batteries are not included in this E27 bulb set. 4. Wide Application: Ideal for both indoor and outdoor working, the LED work light bulb can be flexibly applied to basement, garage and so on. 5. Quick to Install: Light in weight and compact in size as well, this E27 LED bulb ensures no slipping and perfect match, very simple to install. Specification: Item Type: Battery Powered Work Light Bulb Lamp Holder Parameters: 12W 12V Material: PC Color Temperature: 5500 6500K Brightness: 350 1300lm Applicable Battery: 18V lithium battery, shipped without battery. . Package List: 1 x Battery Powered Work Light Bulb1 x Battery Adapter1 x User Manual