aging daylightandelectriclightto provide 50fc(500lux)on
the workplane,andpermitting viewwheneverpossible.

The system was built from readily-available components, which
might be interchanged later with more advanced technologies.
The workpermittedtesting ofbasicresearch premisesat full-
scale, enabling us to examine the validity of advanced material
concepts(such as those for electrochromicglazings)that can-
notbe testeduntil large prototypes can be built.

Energy, control status, and illuminance data were collected for
over a year in both reduced-scale and full-scale field test facili-
ties.Occupant response studies were also conducted.Hourly
DOE-2 building energy simulationspredictedthat16-26% an-
nual energy savings and peak demand reductions could be ob-
tained with the automated venetian blind|lighting system com-
paredtoanadvancedspectrally-selectivewindowsystemin
LosAngelesforallwindowexposuresexceptnorth.Moni-
tored daily lighting energy savings averaged 35% in winter and
rangedfrom40-75% in summer, whencomparedto asimilar
staticpartlyclosedblindsystemwiththesamedaylighting
control system.Ifcomparedto anon-daylightedspace,daily
lightingenergysavingsrangedfrom22-86%.Summerdaily
cooling load reductions were measured to be 5-25%, while peak
cooling loadreductionswere even larger.The control system
metalldesignobjectivesoverwidelyvaryingconditionsto
within 10% for 90% of the 14-month monitoring period in full-
scale.