1, head number, head number to moderate. Household generally do not exceed 12, the use of the battery in the 2 ~ 3 for good, and then a little big wave for other special needs can be determined according to their needs. Of course, high-power LED flashlight generally can not reach the number of 12.
2, welding, welding to prison. Each diodes are connected by welding on the circuit board, if the weld contact is not good, it may cause the bulb does not light or affect the whole service.
3, ordinary batteries, battery and lithium battery two, although the lithium rechargeable batteries, but the low life of about 2 years, LED’s life expectancy of about 10 years, can choose according to the actual situation
4, brightness, good LED flashlight high brightness, slow decay speed.
5, bulb, bulb case, the naked eye is difficult to distinguish between its good or bad, can be lit in the case of light bulb consistency.
6, waterproof, good LED flashlight with waterproof function, good seismic performance, that is resistant to fall. Because it belongs to electronic products, flashlight front has a circuit board, once the water short circuit, causing damage.
7, aperture, good LED flashlight aperture for a circular uniform, poor LED flashlight spot is divided into yellow and blue uneven distribution. Try to focus on a surface condenser bulb. The torch is unlike ordinary flashlight can adjust the focal length, the purchase should pay attention to do not have astigmatism phenomenon.
8, appearance, you can choose aluminum shell, beautiful and generous.