Check the listing for details. Bigblue HL450N 450 Lumens Head Lamp. Condition: New. Listed at 109.99 USD. Discover the joys of effortless illumination with Bigblue's HL450N, a head-mounted light that redefines the diving experience. Light weighs 6.6 oz. (187 g) with batteries and is negatively buoyant 1.98 oz.