PIR Sensor Light
1.Does the light only automatically turn on when it’s dark outside?
YES,when it’s dark and the sensor has detected people.

2.Can this light be switched on permanently ?
No, only works with the sensor.

Normal Wall Light
1.Will this be OK on an outside wall unprotected or should it go in a porch or under shelter?
Perfect for outside.IP44 Weatherproof

2.Is this light supplied with a bulb and is the bulb replaceable?
The LED bulbs have a lifetime of more than 30,000 hours. Non-replaceable.