when cloning you want your t-5s right on top of them within 3".the light is what is going to jump start the clone to begin rooting.by shading your plants away from the light you prolong the process.You will not burn your clones with flouros,hell you could put the light right on top of and touching the leaves and it wont hurt them.another thing is you want a little bit of warmth.The closer to 80 degrees (but not over ) the faster it will root
Ive had most success with a DIY bubble cloner (over 90% success)i keep water between 75-78 degrees,constant air supply,and i put my t-5s right on top of them (within1-2")i get roots within 5-7 days