What is the principle of projection lamp? Long service life?
Mercury lamp is usually five thousand to ten thousand hours, the laser is said to be up to twenty thousand hours, LED lights can reach twenty thousand hours
Mercury lamp is usually five thousand to ten thousand hours, the laser is said to be up to twenty thousand hours, LED lights can reach twenty thousand hours
Mercury lamp is usually five thousand to ten thousand hours, the laser is said to be up to twenty thousand hours, LED lights can reach twenty thousand hours
