Smart Light Bulbs Assembly: No Assembly Required Color: White Bulb Used: Led No. Of Lights: 1 Net Quantity (N): 1 Portable, Light Weight & Durable USB Tube light with High Brightness Emergency Tube light can be used with Power Bank, Laptops, CPU (Central Processing Unit) and Smart Phones via OTG, very convenient for your daily use Low electric power consumption, energy saving and environment - friendly High efficient light source in low voltage of 5v constant voltage drive Emergency 5 Watts USB Tube Light very useful for multi - purpose activities, can be fixed at shelf or wardrobe lighting commercial applications, product displays, under counter lightnings