Yeah, it's hard to tell there's any growth except by comparing pics. 1/4" is about right. Most buds have 12 to 18 inches of vertical space, while three main kolas are pushing it to about six inches from getting too hot. I just figure I can bend them when the time comes. And it's a weird slant, so I could always remount the HPS to a higher spot and gain another three or four inches.

The number of vegging days seem to be a huge detail in grows with limited space...I went 46 days and I'm thinking I'm okay...guess I'm gonna find out for sure.