‎3.7 inches

☀ NEW PRODUCT POWER IDEA: YINGHAO patented solar lighting system is a completely independent off-grid power system, with a portable solar panel and larger power output, combining the chargering and lighting. 2 LED bulbs light can work indenpendently with on and off switches. The solar panel has characters of anti-reflective and high-transparency.
☀ WATERPROOF SOLAR PENDANT LIGHTING: The portable solar panel and bulbs is waterproof at rating IP44 and with high-capacity battery (5000mAh). It charges quickly with 6-8 hours strong and direct sunlight and provides 4-12 hours of lighting at night(100-200 lm). You can check the battery power by the indicator on the control unit.
☀ BRIGHT SOLAR LIGHT WITH ON & OFF SWITCH: 1 x 1W bulbs can work about 12 hours after full charged. 1 x 2W bulbs can work about 6 hours after full charged. If 2 bulbs turn on at the same time, they can work 4 hours. The bulbs can be applied to both indoor and outdoor. Perfectly used as a solar indoor lights for home, solar shed lights, solar camping lights, solar garden lights as ordinary security or emergency lighting.