5200 Series Cap Lamps feature a smaller, Lexan headpiece which provides high impact resistance and a lighter weight. Also features a fully focusable dual filament Xenon bulb and a slide type connection of head-piece to charger.

Mark V (5200 Series) Wheat caplamps feature an intrinsically-safe battery, a specially-designed highly flexible cord, and a dual filament Xenon bulb with both filaments fully focusable. A single knob controls all switch and focusing functions. Lamps are charged through their headpieces.

Koehler's Series E (6400) Wheat Cap Lamp is designed to meet international mining requirements. The Series E employs two fixed focus bulbs: a primary 1.0 amp Halogen bulb and an auxiliary 0.5 amp Argon bulb. A single knob lights and extinguishes each bulb in turn. The improved design makes assembly and repair simple