MH burn in time

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I just bought a 150 watt 10000k MH unit Japanese make (dazs octopus) with an osram ballast.
The light is not as bright as I expected and not as bright as my 4x 36 wat pcs. I got the light 4 days ago and have increased the lighting period by 2 hrs a day now its on for 10 hrs a day.
Will I expect to see it significantly different with the burn in time completed and How do I know if the burn in has been succesful.

 

[xtrstangx]

After 100 hours, the bulb is burnt in.

You shouldn't get significant intensity change or huge color change, but there may be some.