Generally speaking, the factors that affect lamps by geographical location are nothing more than "high altitude, extremely high temperature, extremely low temperature and large temperature difference between day and night".
Gansu Lanzhou
The altitude is about 1000 meters, and the temperature difference between day and night is relatively large. But it will not have a great impact on the lamps.
At present, most of the lamps in outdoor lighting engineering are LED, which has the advantages of good energy saving, high light efficiency, low calorific value and long service life.
Moreover, most of the lamps and lanterns in outdoor lighting projects are IP65 or above, which can ensure that the lamps and lanterns are rain-proof and dust-proof in daily situations, so you don't have to worry about this. I tell you with my experience and professional knowledge that the impact is not great and can be ignored.