Glare Nodes don´t work, can´t find reason

Hi, I am working on a project-proposal for a light-installation. I try to built a running circuit with lightbulbs. Therefore, I created three lightbulbs, that light up differently and will be duplicated later on to fill the letters.

To make it look more natural I worked with glare-notes in the compositer. Each lightbuld has a wirepart in the center with an Objectindex (Circle.1 = OB:1, Circle.2 = OB 2, Circle.3 = OB 3). Strangely, the glare only works only for one lightbulb (Circle.3), but not for the others; although I used the same Node-Set-Up.
Would be very happy, if someone has an Idea why it doesn´t work.

Thank you!

If the bulbs have different strengths of light, you might have to adjust the “Threshold” in the GlareNode.