Home > Free Information > Measuring Light Intensity
Most orchid growers love to take photographs of their flowers. If you're one of those, and have a camera with a built-in light meter - most single-lens reflex (SLR) cameras do - then you can use it to measure the light intensity, too.
You only need three things: your camera (set at ISO 100), a piece of white paper, and the calculator below.
Simply put the paper in the location you wish to measure, point the camera at it so it fills the frame completely - trying to shoot as close to perpendicular to the paper as possible, adjust the aperture so that you get a decent shutter speed, and then use those values in the calculator to determine the foot-candles of light intensity. (Note that these numbers are not exact, but certainly give a "ballpark" figure to work with.)
Home > Free Information > Measuring Light Intensity