Mine is more light yellow with pink tips. For the past 6 months, it has been 14 inches under an AP700 maxed out at 80% for a few hrs. Oddly enough, it has grown substantially only in encrusting form.
It encrusted the plug completely, then proceeded to encrust another 2 sq inches on the rock below it. The color is as vibrant as it has been, just no vertical growth out of the 3 branches.
Im assuming this means my light is too strong?