Got a new grow light, Mars Hydro 600w and it's been great everything has exploded with growth. On my Ficus the newer leaves on top are turning an odd color and it's happening on the top leaves of my Japanese Weeping Willow. The willows are cuttings I've had for 3 weeks and have grown really well. Only had this light for a week and I've noticed this the past few days. Lights I had before aren't nearly as strong. Im in 7b and plan to move everything outside once it's warmer, currently a lot of snow in Bayonne, NJ. Are they just acclimating to stronger light? Should I raise the light higher? It's about 15 inches from the top of the plants. Thank you everyone.