As for energy consumption in existing lighting environments, the average illuminance
values in 17 domestic residential spaces were measured and presented in Figure 1.
characterization, results were gathered from all screen printed and basic airbrushed devices but only three out of the five in-mold made parts illuminated over the whole area of the EL device; and of those three, all failed at the highest operating conditions (the values recorded during the test were the highest illuminance
achieved before failure).
This can be achieved with axially symmetrical light distributions with closely spaced illuminance
distribution perpendicular to the wall to effectively illuminate high walls and minimize spill light in the room (Figs.
The work plane daylight illuminance
, as well as heating, cooling, and lighting, energy consumption was measured.
Sensitivity as a Function of Spatial Frequency and Illuminance
This point was chosen because it corresponds to the point B 50 L of the European beam pattern, the so-called glaring point in the beam pattern that causes the largest glare illuminance
. For the U.
The CL-200 Light Source Chroma Measurement System from Minolta Corp.'s Instruments Div., Ramsey, N.J., can measure tristimulus colorimetrics, chromaticity, color difference, and both color temperature and illuminance
of light sources.
We switched on the ceiling flourescent lighting fixtures, which produced a measured (Digital Light Meter, Model LX-101; Edmonds Scientific Co., Barrington, NJ) illuminance
level of 575 lx on the table top in front of the subjects.
The Iluminating Engineering Society of North America publishes guidelines for minimum maintained average illuminance
, interior and exterior, ambient and task light.
TracePro 2.0.4 provides enhanced support of standard illumination output formats for the Illumination Engineering Society and Eulumdat, and DXF output for irradiance and illuminance
Generally, ambient illuminance
levels should be lower than horizontal illuminance
levels (foot-candles on the desktop) required for lighting individual tasks.
The Type 217 Light meter measures approximately 2[inches]x2[inches]x3.5[inches] in its case and is ideal for field surveys of illuminance
in schools, hospitals, kitchens, warehouses, offices, maintenance shops, and any other place where good illumination is essential.