Simplex.
Start off low and slowly acclimate, they tend to turn a nice purple very quickly in high light and soon after bleach and die. Dont rush the purple, it will come, focus more on not letting the inner-brown part get too light. If the tips are getting purple and the brown is staying dark, you are good. If the tips are getting purple and the body is lightening also then it is getting too much light.
ime
-John-