We should try to get the charts sticky'd in here that have the lumens / distance for the different HID lights and possibly even for flouro's... Taken from:http://forum.grasscity.com/advanced-growing-techniques/79988-chart-thread.html
Probably best posting it here http://forum.grasscity.com/absolute-beginners/216418-introduction-lighting.html Then see if you can get charts added to first page.