Posted August 11, 2017 On 23/06/2012 at 10:59 PM, MetalDragon said: I did some tests years ago. You'll find the range of the brightness is bigger with more QL. Also something you might not of known - the QL of the tar/oil you use affects the range also! Most of my lamps have ql20 tar in them, I could simply plant 40+ off-deed and wait but it struck me that `empty lamp` might be really easy to code. Share this post Link to post Share on other sites