You can always as your local group (fb or other) or your LFS to borrow their Par meter - it's pretty critical and just guessing is not really what you want to be doing. What kind of lights are those? Can you control the intensity?
You can always as your local group (fb or other) or your LFS to borrow their Par meter - it's pretty critical and just guessing is not really what you want to be doing. What kind of lights are those? Can you control the intensity?