MH Lamp wrong color (is it?)

[Quagga]

Hi, brothers.
I have started my third grow and I decided to use MH lamp for vegetative growth period. Today I have installed 250w 6000k MH lamp in to box and move my plants from small pots to 7L tares. I'm using throttle from my previous setup with HPS lamp. Thing is that I can see blue color while lamp starting and green when it fully running.
I never used MH lamps before, is this color okay (I know green color not good for plants)?

Thanks!

When just turn on.


After minute of work.

 

[zero244]

Yes it should work fine.........in fact I use a 7200k lamp, which is even whiter than yours and it grows very well. I know everyone around here will not agree, but I prefer to use MH for the entire grow with excellent results.