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it depends on the required applications , but you must consider the required lux.
The Selection of Outdoor lighting depends on following factors-
1. Intent of Lighting ( Activity, Architecture, Atmosphere )
2. Selection of Right luminaire
3. Lamp characteristics
4. Photometry
5.Physical characteristics ( shape, size, appearance )
6. Controlgear
7. Other factors like weather, mechanical, Electrical
it depend on the application
