What is the screen ratio?

We generally refer to the ratio of the width and height of the screen as the aspect ratio (also known as the aspect ratio or the screen ratio). At present, t

LED road lighting and traditional roads

introduction

Street lamps are an important component of urban lighting. Traditional street lamps often use high-pressure sodium lamps, and the low-efficiency of high-pressure sodium lamps as a whole has caused huge waste of energy. Therefore, the d