What is the minimum lamp efficacy required to be considered as energy efficient?

Related questions

1. Do antagonists have efficacy?
2. What is Bandura's self efficacy theory?
3. What are the 4 types of evaluation?
4. What are the four levels of evaluation?
5. What is better effective or efficient?
6. What is efficacy variable?
7. Do vitamins Bcaas?
8. What do these sacramental signs mean?
9. Do antagonists block reuptake?
10. What is potency and efficacy?

Tags

1. #least
2. #fitting
3. #energy
4. #efficient
5. #provision
6. #fixed
7. #either
8. #accept
9. #lamps
10. #holder
11. #lumens
12. #fittings
13. #reasonable
14. #luminaries
15. #output
16. #circuit
17. #greater
18. #requires
19. #achieve