1, moderate head count. Household generally not more than 12, use the battery in the 2 to 3 as well, and then a little big waves for other special needs can be determined according to their own needs.
2, welded to prison. Each diode is connected to the circuit board by welding, Weld if contact is not good, it may cause bulb does not light or affect the overall use.
3, bulb condenser surface as possible on one point. This flashlight ordinary flashlight can not adjust the focus, the purchase should be careful not to have astigmatism.
4, the power switch contacts to be obvious. This flashlight use of a rotary switch, and tighten it open, then loosen it off, if the contact is not obvious, when it is easy to cause blinking phenomenon.
5, waterproof and dustproof. Although it belongs to electronic products, electrical production of brightly lit LED Flashlight fully sealed design, can work in the heavy rain, waterproof and dustproof, resistant to high temperature, high humidity performance, can be used in various environmental conditions.