Please help, white chronic, first soil grow 11 days in

So I am 11 days in from germination and I am having real trouble with temperature fluctuation from 18degrees celsius up to 29-30. 4 of 7 look to be growing well but slightly lighter shade of green than id like, any help would be greatly appreciated, I can post pictures of the setup if needed.

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Pics definitely will help

Currently at work I will post when I get home, thanks