Can't Create Powerful Grow Lamp?
Do you have the right quality (exotic) of the Essence of Luck?
Wiki doesn’t say Exotic Essence of Luck but your right, that was it! Thanks
(edited by Sola.7250)
All four forms of the item use the same name, “Essence of Luck”. The wiki reveals that when you click on the item for more information, or highlight the text revealing the extra annotation of the Luck’s quality. The thumbnail also differentiates from the four forms as well.
Yeh you have to look pretty hard to see that it requires the exotic Essence of Luck. I just discovered this recently too.