How will shade cloth effect my plants?

I'm currently growing outdoors, and it gets to be about 98 right now at the hottest part of the day. Later in summer it will get even hotter than this, around 120 . I use a shade cloth that blocks 50% of light, and a misting fan, which combined lowers the temperature about 10 to 15 degrees. The sun shines on them eight hours a day. I was wondering if the shade cloth will prevent my plants from getting the right amount of light that they need. Thanks so much I really appreciate it.

Also I forgot so ask what signs would the plants show if they aren't getting enough light? I planted them about seven days ago, they sprouted green about 5 days ago. They are all different heights, but the tallest one is about 3 1/2 inches with 4 leaves. Thanks again =]

how did u go with the shade cloth? im about to do it to my plants