5000-lumen diving flashlight with dual CCT white light and red light — rated to 100m depth
The Sofirn SD11 is a purpose-built diving flashlight rated to 100 meters depth with IPX8 waterproofing. Outputting 5000 lumens, it provides massive underwater illumination where light absorption by water makes high output essential. The dual-CCT white light lets you choose between color temperatures to suit different diving conditions — warmer tones for better color rendering of marine life, cooler tones for maximum perceived brightness.
The inclusion of a 660nm red light is particularly valuable for diving: red light doesn't spook marine life the way white light does, making it the preferred option for underwater photography and observation. It also serves as a signaling tool for dive buddies. The 21700 battery provides the high capacity needed for extended dive sessions, and USB-C charging makes post-dive recharging straightforward.
At $61, the SD11 is competitively priced for a 100-meter-rated dive light with 5000-lumen output. The aluminum body is built to handle the pressures of deep diving, and the six modes provide flexibility from low-output ambient lighting to full turbo for wide-area illumination. While it's purpose-built for underwater use — the form factor and switch design are optimized for gloved operation — it works perfectly well as a high-output surface light for boating, dock work, or emergency use.