section
item
1980
Helio Perfect, model Optima Solar, a mercury
vapour arc discharge sunlamp, combined with four
quartz-tube elements.
building
helivium.com
1980 - sunlamp (tube light)
1980 - sun- and heatlamp
1980 - sun- and heatlamp
1981 - heatlamp (incandescent)
1984 - sunlamp (blended)
1985 - sunlamp (mercury)
1987 - sunlamp (tube light)
1987 - heatlamp (incandescent)
building 3 (time line),
section 9 (1980-1989)