For the outdoor lighting what is the best and why ?

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

 

 

Can you please clarify your question little more and include there what you are looking exactly either in light fittings, light types or control etc.

it depend on the application 

It all depends what it is intended for. There is no specific answer