Here is a video of a Polish 400w metal halide street lantern know
n as the Mesko OURJ 400 that has a LRJ 400 metal halide lamp flashing indefinitely like an EOL preheat fluorescent tube. The lamp is being run on a mercury vapor ballast using the ZLM setup, which consists of a capacitor, a resistor, and a ZT400 glowstarter all being wired in a series configuration that is parallel to the lamp. I wonder what might cause the lamp to not fully ignite and behave like an EOL fluorescent tube upon startup?

Here is the video of the Mesko OURJ 400 lantern:

https://youtu.be/k2N0gl9z2l0