Q: And on top how many light can we put ? Just one or can hv many light to shine on painting and right corner

Reply: But if spot lights.. do buy lots of spares.  As often the aircon servicing person is going to have their ladders kissing these lights and damaging them if they are not FLUSHED into the ceiling. So chose those flushed into the ceiling tillable lights are best. 

Master. Are such lights ok for my balcony ceiling and the ceiling just after the house main entrance?

Both fine or okay. For main entrance, must clear the door GAP (if any)

But when aircon servicing etc... because the ladder doesn’t kiss and fell it. ?