When you are in adventuremode you can still break glowstone and redstone lamps.
Linked issues
Comments 2
Duplicate of MC-3066 , please use the search function to see if your bug has already been submitted. Currently over 30% of tickets are being closed as duplicate.
This is not an API feature request. This JIRA is for API feature requests only.
For bug reports please use the MineCraft Bug JIRA
For game feature requests/changes please use the MineCraft Forums: Suggestions
Also, you should follow the standard bug report format when you submit this to the correct place.