How many square meters of room can a 1000 watt high-voltage dysprosium lamp illuminate?

This lamp can illuminate a room of 200 square meters.

This is because the high-pressure sodium lamp has very high light efficiency and can produce a lot of high-energy short-wavelength light. This kind of light can penetrate objects and air well, so it can illuminate a large area.

In addition, the light efficiency of high-pressure sodium lamp is usually between 40-60 lumens/watt, that is to say, about 400-600 lumens of light are generated in 1000 watt high-pressure sodium lamp. According to optical properties, lumen number is directly proportional to illuminance.