First, the light source has good directionality, on-demand lighting, as an emergency table lamp is better.
Second, sufficient illumination to meet your general lighting needs.
Third, DC power supply, good workmanship, no stroboscopic, no electromagnetic radiation.
Fourth, green, energy efficient.
Five, solid light source, anti-mechanical vibration.
Sixth, no ultraviolet light, no infrared.
Seven, LED small lamp beads have a long life.