400w to 1000w Anyone Know Results?

Just curious i just started some Super Lemon haze under a 400w im telling my brother to buy a 1000w because it will make such a difference. Im just curious if anyone has switched mid-grow and seen amazing differences.? I understand there are many many variables but im just wondering if/has anyone done it mid grow. This will reinforce my push for a 1000w Help me out fellas:blsmoke:
 
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