light acclimation

[fiorano]

i've heard if you change your bulbs to a different typ with a higher kelvin rating your supposed to acclimate your corals. and im going from giessmann 13000k to aquaconnect 14000k and they are a much different color. i was just wondering if i have to acclimate them or if it wont make that big of a difference to the corals. their 250w pendants btw.