The Nitecore CL10 clip-on-light has a maximum brightness of 45 lumens running off 2x AAA batteries (alkaline or NiMH/ 2x alkaline batteries included) 

This Multipurpose ultra lightweight Clip-on-light is designed to be a  trustworthy gadget perfect for showing clear warning lights. The CL10 features 3 light sources including red and blue warning flashing, operated by the single detail- oriented button. The light has flood lighting with two white brightnesses to reach an up close range.  The body of the CL10 is made from special PC plastic, ensuring the Clip-on-light is resistant to low temperatures and rain.

The CL10 is super lightweight with a versatile clip enabling firm attachment to items of clothing such as caps and pockets. The clip also adjusts to 180°, to aim for the perfect angle of the beam.

Brightness levels(based on 2 alkaline AAA batteries compatible with  NI-MH battery):

• White High- 45 lumens, 15 hrs runtime, 15m beam distance, 59cd
• White Low- 20 lumens, 28 hrs runtime, 10m beam distance, 23cd
• Blue constant-on- 3 lumens, 18hrs runtime, 4m beam distance, 3cd
• Red constant-on- 5 lumens, 17 hours runtime, 6m beam distance, 9cd
• Red/ blue warning flashing- 5 lumens, 17 hrs runtime

Advanced temperature regulation (ATR) regulates the output of the CL10 according to the working and ambient temperature to maintain optimal performance while preventing the LED from overheating. The outputs are measured in total of runtime, including output at reduced levels due to temperature or protection mechanisms in the design, causing the brightness level to drop down.

Includes: CL10,Clip and Alkaline AAA battery x2