Seedling problem

I started my seedlings about 4 weeks ago. I have them under two screw-in 100 watt flouresent lights that give off 400 lumins and a softlight GE flood light that gives off 725 lumins. My seedling leaves are turning yellow. Also my plants are going soft and dying on me. Any suggestions? I started out with 125 seedlings and am down to about 60 now. I am hoping to get them started inside and move them outdoors in MArch. Any help would be appreciated. If I have the wrong lights please include name brand of lights needed. Also, I have the seedlings in 12 oz styrofoam cups.Thanks!
 
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