- The AC4D Series exceeds ITE standards and MUTCD visibility specifications. - LED light source operates on 2 or 4 D-cell batteries (not included). - Three modes of operation, Flash (Type A), Steady-Burn (Type C), and Off. - Equipped with a photocell which turns light on and off at dawn and dusk. - Optically correct polycarbonate lens, high impact case, and stainless steel contacts. - Tested by a Coast Guard approved laboratory. - Lightweight, may be self-certified for compliance with NCHRP-350 crash test standards. - AC4D-NL has an amber lens with case color choices of orange, blue, green, and black. - AC4D-RL comes with a red lens and yellow case. - MAC4D comes with a mono-directional lens and yellow case. - MAC4D-DB is the same as MAC4D but features a detached base design for safe and easy battery maintenance when lights are mounted out of reach on signs, stands, or posts. - Each light supplied with hardware: bolts, switch pins, and wrench. - Bolt protectors available at extra cost.