What does a purple light mean in Amsterdam?

Related questions

1. How many canals are there in Amsterdam?
2. Is it safe in Amsterdam at night?
3. Is it safe to travel alone in Amsterdam?
4. Is Amsterdam Netherlands or Holland?
5. Is it cheap to live in Amsterdam?
6. What is a green light district?
7. What's the green light district?
8. Is alcohol illegal in Amsterdam?
9. Why is Amsterdam called Amsterdam?
10. Is 3 days in Amsterdam enough?

Tags

1. #purple
2. #named
3. #colour
4. #means
5. #lights
6. #transexual
7. #district
8. #always
9. #though
10. #prostitute
11. #johan
12. #usually
13. #cruijff
14. #coloured
15. #lamps
16. #there
17. #light
18. #after
19. #arena