So I am a new grower, just started on my first plant under a led. I have noticed a odd Yellowish Discolour in the centre of the leaves unlike most pictures I see online. So I am struggling to identify the problem. I did accidentally have the light hanging 10 inches above the plant when I was told it should be 16-24. Is this correct and can anyone suggest a recommended hight for a 150w led? I am also unsure of whether I am topping my plant properly, the leaves come out odd. I apologize in advance for my ignorance on the subject.