The Bigblue TDH-04 Helmet Light Mount is a compact helmet light mount engineered to secure dive lights that use the Bigblue mounting square, offering a stable connection for helmet-mounted dive lights. The mount is molded from reinforced engineering polymer to resist corrosion and impact in saltwater environments. Its low-profile design reduces snag points while maintaining positive retention under dynamic movement, and the standardized Bigblue mounting square ensures compatibility with Bigblue 3000-series light heads and other lights using the same interface. Installation is tool-free with a reliable locking clamp that enables repeatable attachment and removal without specialized tools. The mount supports precise beam alignment for helmet-mounted dive lights and resists loosening from vibration during swim and descent. Product is sold as the mounting bracket only; helmet and light are not included.