According to Lifebook T-11, it is acceptable to use a headlamp instead of a CN approved lantern to perform work from dusk to dawn. The headlamp must produce at least how many lumens?

• A. 50
• B. 150
• C. 300
• D. 500

Answer: (B)

Lighting from dusk to dawn is all about making hazards and steps clearly visible while keeping your hands free for the work. Lifebook T-11 allows using a headlamp as an alternative to a CN-approved lantern, but it sets a minimum brightness: the headlamp must produce at least 150 lumens. This level provides enough illumination to clearly see the work area and any potential hazards without needing bulky gear, while still fitting the hands-free requirement. A headlamp with only 50 lumens would be too dim for reliable visibility in low light, increasing the risk of trips or overlooking hazards. Higher outputs like 300 or 500 lumens would also meet the requirement, but the standard specifically establishes 150 lumens as the minimum.