The first thing to determine is the number of horizontal footcandles
(lumens per square foot) required on the pavement for various conditions.
Television coverage requires much higher light levels than those given in the standards, including footcandles
on vertical surfaces.
This data uses candlepower, reflector type and fixture type, at the light source to project the number of footcandles
of illumination at a target.
If your organization doesn't have this data, look instead at local building codes and the footcandle
guidelines from the Illuminating Engineering Society (IES).
While we're unaware of any sleepovers involved in creating this prototype, Patient Room 2020's human-centric design speaks more to the needs of the patient and caregiver than it does to a by-the-book LPD or footcandle
The HID fixtures are installed over opposing curbs in the first transition zone, with spacing increasing and lamp wattage decreasing as the design footcandle
levels--when a system is first installed--may be as much as ten percent higher than maintained, but will drop off over time.
If all criteria are met for a football field, including footcandle
levels and uniformity, it may make more sense to install 1500-watt metal halide lamps instead of 1000-watt metal halide--even though the 1000-watt lamp has a longer life (10,000 hours compared to 5,000 hours).
is a unit of illumination defined as the illumination on a surface one square foot in area on which is uniformly distributed a flux of one lumen.
All of this seems fairly well removed from our domain of footcandle
levels and power density.
Because bollards can be spaced closely together, you can use a lower footcandle
level and get a more even spread of light," says Rosen.
Model XL 150-2 offers bright Quartz Halogen 200 watt illumination, 3600 [degrees] Kelvin color temperature, 4800 footcandle
output to a fiber optic headlight, world wide power (100/240v - 50/60Hz), and fits most cables.