1. More rain all year round,humidity,salt fog heavier areas;

2. The working environment is humid,there is water vapor place;

3. Elevation of not more than 2000m;

4. The working environment contains sand dust,dust and other non-flammable dust;

5. The work environment contains weak acid,weak acid and other corrosive dust;

6. Lighting for energy-saving projects and maintenance of replacement of difficult places;

7. As oil, chemical, food, pharmaceutical, military, warehousing and other places flood lighting, projection lighting or street lighting.

1. More rain all year round,humidity,salt fog heavier areas;

2. The working environment is humid,there is water vapor place;

3. Elevation of not more than 2000m;

4. The working environment contains sand dust,dust and other non-flammable dust;

5. The work environment contains weak acid,weak acid and other corrosive dust;

6. Lighting for energy-saving projects and maintenance of replacement of difficult places;

7. As oil, chemical, food, pharmaceutical, military, warehousing and other places flood lighting, projection lighting or street lighting.

1. More rain all year round,humidity,salt fog heavier areas;

2. The working environment is humid,there is water vapor place;

3. Elevation of not more than 2000m;

4. The working environment contains sand dust,dust and other non-flammable dust;

5. The work environment contains weak acid,weak acid and other corrosive dust;

6. Lighting for energy-saving projects and maintenance of replacement of difficult places;

7. As oil, chemical, food, pharmaceutical, military, warehousing and other places flood lighting, projection lighting or street lighting.

1. More rain all year round, humidity, salt fog heavier areas.

2. The working environment is humid, there is water vapor place.

3. Elevation of not more than 2000m.

4. The working environment contains sand dust, dust and other non-flammable dust.

5. The work environment contains weak acid, weak base and other corrosive gases.

6. Lighting for energy-saving projects and maintenance of replacement of difficult places;

7. As oil, chemicals, food, pharmaceutical, military, warehousing and other places lighting.

8. For -50 ℃ above the low-temperature environment.

1. More rain all year round, humidity, salt fog heavier areas.

2. The working environment is humid, there is water vapor place.

3. Elevation of not more than 2000m.

4. The working environment contains sand dust, dust and other non-flammable dust.

5. The work environment contains weak acid, weak base and other corrosive gases.

6. Lighting for energy-saving projects and maintenance of replacement of difficult places;

7. As oil, chemicals, food, pharmaceutical, military, warehousing and other places lighting.

8. For -50 ℃ above the low-temperature environment.

1. Areas with more rain, more humidity and heavier salt spray;

2. A place where the working environment is wet and there is water vapor;

3. The altitude does not exceed 2000m;

4. The working environment contains incombustible dust such as sand dust and dust;

5. The working environment contains corrosive gases such as weak acids and weak bases;

6. Applicable to lighting energy-saving renovation projects and places where maintenance and replacement are difficult;

7. As a long-distance floodlighting and street lighting for petroleum, chemical, food, pharmaceutical, military, warehousing and other places.

1. More rain all year round, humidity, salt fog heavier areas.

2. The working environment is humid, there is water vapor place.

3. Elevation of not more than 2000m.

4. The working environment contains sand dust, dust and other non- flammable dust.

5. The work environment contains weak acid, weak base and other corrosive gases.

6. As oil, chemical, food, pharmaceutical, military, warehousing and other places flood lighting, cast light lighting or street lighting.

1. More rain all year round, humidity, salt fog heavier areas.

2. The working environment is humid, there is water vapor place.

3. Elevation of not more than 2000m.

4. The working environment contains sand dust, dust and other non-flammable dust.

5. The work environment contains weak acid, weak base and other corrosive gases.

6. As oil, chemicals, food, pharmaceutical, military, warehousing and other places lighting.

1. More rain all year round, humidity, salt fog heavier areas.

2. The working environment is humid, there is water vapor place.

3. Elevation of not more than 2000m.

4. The working environment contains sand dust, dust and other non-flammable dust.

5. The work environment contains weak acid, weak base and other corrosive gases.

6. As oil, chemicals, food, pharmaceutical, military, warehousing and other places lighting.

1. More rain all year round, humidity, salt fog heavier areas.

2. The working environment is humid, there is water vapor place.

3. Elevation of not more than 2000m.

4. The working environment contains sand dust, dust and other non-flammable dust.

5. The work environment contains weak acid, weak base and other corrosive gases.

6. As oil, chemicals, food, pharmaceutical, military, warehousing and other places lighting.

1. More rain all year round, humidity, salt fog heavier areas.

2. The working environment is humid, there is water vapor place.

3. Elevation of not more than 2000m.

4. The working environment contains sand dust, dust and other non-flammable dust.

5. The work environment contains weak acid, weak base and other corrosive gases.

6. As oil, chemicals, food, pharmaceutical, military, warehousing and other places lighting.

1. More rain all year round, humidity, salt fog heavier areas.

2. The working environment is humid, there is water vapor place.

3. Elevation of not more than 2000m.

4. The working environment contains sand dust, dust and other non-flammable dust.

5. The work environment contains weak acid, weak base and other corrosive gases.

6. As oil, chemicals, food, pharmaceutical, military, warehousing and other places of road lighting.