***Wisdom 4A Model lamp is NOT MSHA approved!*** The Wisdom 4A exploratory lamp is designed for demanding outdoor activities like camping, biking, hiking, and caving. Its rugged construction ensures durability, while waterproofing up to 20 meters provides reliable performance in wet conditions. Additionally, it functions as a power bank, allowing you to charge your phone and other USB-compatible devices on the go, making it an essential tool for extended adventures. These lamps have three modes of operations as follows:High / 25,000 lux / 533 lumen / 5 hours of operationMed / 12,000 lux / 265 lumen / 13 hours of operationLow / 1,800 lux / 50 lumen / 60 hours of operation Model Comparison Wiselite2 Wisdom3A Wisdom4A Brightness Modes High High, Low High, Medium, Low MSHA Approved Yes (19-A160002-0) No No PA Approved Yes (BFE 2116) No No Continuous Disharge Time 16h 13h (High)60h (Low) 5h (High)13h (Medium)60h (Low) Main Light Working Current 400mA 570mA (High)80 mA (Low) 1400 mA (High)570 mA (Medium)80 mA (Low) Main Light Power 1.2W 1.71W (High)0.24W (Low) 4.2W (High)1.17W (Medium)0.24W (Low) Main Light Luminous Flux 167Lm 265LM (High)50LM (Low) 533LM (High)265LM (Medium)50LM (Low) Lamp Lighting Degree(Initial Lighting degree in 1m) 8500Lux 12000lx (High)1800lx (Low) 25000lx (High)12000lx (Medium)1800lx (Low) Can be charged with USB cable No Yes Yes Lens Type Partial Dispersion Clear Clear
