I gave a fair amount of light ....but to me again just my experience is I run very high mag a phos and nitrates ..and this thing took off . Just as well as the rest of my chalicesI lost a small frag of the BPC Flamethrower in my tank when all of my other chalices were doing really well. Are you guys that still have it giving it a ton of light? What is the secret to growing it out? Not that I will be able to find another frag for sale of it any time soon.