You can apply silicone to the glass to help the GS adhere better. Then silicone the GS once it has dried and put coco fiber or peat moss on the wet silicone to cover it. From what I have learned, 10,000k is equal to the light at dawn. 5,000k - 6,500k is best for plant growth because it is like the midday sun. Someone correct me if I am wrong.