4200k vs 6500k

I just bought a 1000w light setup and was wondering if it was worth spending the extra cash on hortilux blue bulb vs the regular hortilux my bulb? The regular mh is rated at 4200k ane the blue bulb is rated at 6500k. The price difference is about $70. Will I get my moneys with with the blue bulb?

6400k will be much better for vegging

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I would get the 6500k, i dont think 4200k will do much for your plants.

Thanks for that info. Makes my decision much easier.