What does the lamp in the room mean?
This answer hasn't been translated yet, so it's shown in English.
The lamp is your Service Streak. It burns brighter as your streak grows, from unlit at 0 to its brightest once your streak reaches 30. For Kingdom Publishers the streak counts months, so it is brightest at 12. If you turned off Show streak in Settings → Preferences → Streaks & Badges, the lamp keeps a steady medium glow and no streak number shows anywhere.