Very nice Markl! I see that green house shelf is working great! Were those AK-47 Lowryder seeds? or just regular Autos? I ask because mine are lowryder, so they generally only grow to 18" tall. So I may not need the extension. Great use of PVC though! I will be using PVC to set up my other lights when the time comes to use them. With mine being just seedlings the AG lights are good enough, I thinkNotice the brown on the 4th picture. She kinda layed up in the light for a little while I think.