400 watt in a 2x4

After 3 days 2 plants emerged. the 3rd took another 5 days and the last never rose but did pop. I believe I let the soil get too wet during germination. The lighting cycle is 18/6 for rooting and the metal halide light is 2.5 feet above the plants on 150 watts. The two t5 florescents sit to the side over them as well. The temp hovers around 25 degrees celcious and relative humidity is 68 percent on average .