Lighting Flashcards
High output LED
bright, little energy, white light, Dim with low voltage dimmer ex. 4 watts on PDP
Should you dim Flourescents
No
What kind of light is Xenon and attributes
Incandescent - dimmable, warm, heat
If sconce is placed over furniture does the 4” projection matter?
No
Beam spreads
R - wide (avail in flood and spot)
ER - more efficient throw
PAR - tighter (avail in flood and spot)
MR16 - Narrowest beam spread (very narrow to medium with spread)
Low voltage incandescent is goo for ….
Energy efficient for lighting small or large objects at a distance
Critical zone for direct glare
45 degrees
If reflected glare interferes with the viewing task it is also called
veiling reflection
Contrast
Drama, interest, emphasis - too much is difficult for fine detail
Uniformity
Perception = comfort and pleasant
Colour
affect comfort and impression
GU-24
Fluorescent - high efficiency CFL
T-8, T-5
higher efficiency and better CRI than some fluorescents
HID
Mercury Vapour
Metal Halide
Where would you use Mercury Vapour?
Outdoor/Industrial - Blue/green light with bad CRI
Where would you use Ceramic Metal Halide?
Describe metal halide
Ceramic metal halide - for high ceilings where long life and high efficacy are desirable - retail point source control
Difficult to dim
Time to warm up
Metal Halides - main disadvantage is colour shift over time
Best colour temp for office
3500
Where should you spec auto occupancy lighting controls?
In all spaces not regularly occupied
- Copy rooms
- Storage rooms
- Restrooms
Daylight responsive controls w/i…..
15’ of windows/skylights
- Height of pendant over dining table in Res?
- Office conference table
- Open office
- Pendants over counters (workroom, reception, kitchen)
- Sconces in bathroom
- Pendants over eating surface
- Art light
- Dining table 66”-72”
- Office conference table - 80” AFF
- Open office - 90” (7’-6”) uno in fixture cut sheet
- Over counters 80”-84”
- 5’-6’ - 60”-66” is best but depending on sconce size
- 2’-6”-3’-0”
- 5’-6”
