don't go over 90 with your seeds, preferably 86F (30C)...
remember the lumen rating on the bulb is figured at 1 ft and 3000 lumens/ft[sup]2[/sup] is enough to grow to maturity IME...you can control the growth of your seedlings with the amount of light they get...I have found that 1500 lumens/ft[sup]2[/sup] works best for the seedlings, but that is the way I grow....if you have 6500K bulbs in your fixture, you are getting 40K lumens to the ~11 ft[sup]2[/sup] below it
really need more information on the grow area you are using like Ps said