Brand new 10K MH bulbs yellow

[Quinster]

I purchased 2 of the same brand 250W 10000K bulbs..1 fired up right away and looked like a 14 000K, the other took a while but when it fired it looked like a 6500K, contacted the retailer who sent me a replacement and when I fired it, it looked like a 10 000K which really threw off the look of the 14 000K looking one, so another was sent out, it was between the 10 and 14K's...so I picked the closest 2 (after 4 months of emails and wondering what to do) and sent the other 2 back. They were all the same bulb, same K rating running on the same type of ballasts.