Self-explanatory. Stained glass panes also obscure the particles, but regular glass and glass panes work fine. In the picture, all candles are lit and emitting light.
Environment
Java version
Linked issues
duplicates 1
Attachments
Comments 2
Thank you for your report!
We're tracking this issue as MC-188529, so this ticket is being resolved and linked as a duplicate.
That ticket has already been resolved as Won't Fix, which means this is considered a bug but won't be fixed. The description of that ticket or the comments might explain the rationale. Please do not leave a comment on the linked ticket.
If you haven't already, you might like to make use of the search feature to see if the issue has already been mentioned.
Quick Links:
📓 Bug Tracker Guidelines – 💬 Community Support – 📧 Mojang Support
📓 Project Summary – ✍️ Feedback and Suggestions – 📖 Game Wiki
Duplicate of MC-188529