What is the thickness of the courtyard lamp pole?
So look at the height of the poles, the conventional 2.0 enough
Less than 3 meters of 2.0. Higher than 4 meters of 3.0
Light pole less than 4 meters in general 2.5
Height, and other specific circumstances need to make a balance in the use of qualified and enough
GB is 3.0, but also need to see the use of the occasion
