Term
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Definition
| most effective as energy saving technique in commercial and institutional buildings |
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Term
- analysis and design techniques
- thermal-illumination tradeoffs
- sun and glare control
- Lighting Control
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Definition
| 4 main issues of daylighting |
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Term
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Definition
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Term
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Definition
| what heat management elements are found in LEDS? |
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Term
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Definition
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Term
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Definition
| what kind of power does diodes use? |
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Term
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Definition
| what must LED lamps include to operate AC voltage? |
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Term
| they now make high power light-emitting diodes with higher lumen output |
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Definition
| why is it possible for use to replace lamps with LED lamps? |
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Term
| the output of individual light-emitting diodes is small compared to incandescent |
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Definition
| why are multiple diodes often used together? |
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Term
7527 lumens
using only 100 watts |
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Definition
| how many lumens can emit from a commercial LED ight? |
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Term
long life
high energy efficiency
high inital costs |
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Definition
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Term
| controlled daylight with supplemented artifical illumination |
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Definition
| what is the goal for all light design? |
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Term
| commercial and institutional |
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Definition
| in what buildings is energy saving most effective? |
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Term
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Definition
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Term
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Definition
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Term
| analysis and design techniques |
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Definition
| lack of accurate but simple techniques, lack of data on sky conditions, changing nature of natrual light |
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Term
| thermal-illumination tradeoffs |
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Definition
| simple comparisons because other computations are not valid |
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Term
| screens, shutters, blinds, awnings, heat-absorbing and reflective glass |
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Definition
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Term
increase luminance of interior
avoid sharp contrasts
position windows to not so bright views
shading devices |
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Definition
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Term
| side lighting and top lighting |
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Definition
| what two ways does light get into a building |
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Term
| when windows are on opposite sides of the room |
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Definition
| when is light most uniform? |
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Term
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Definition
| what permits deeper penetration of daylight? |
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Term
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Definition
| what happens when you place windows perpendicular to each other? |
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Term
| tilting the window at an oblique angle allows for more light to enter |
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Definition
| how can you allow more light to enter a space? |
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Term
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Definition
| how far back does side lighting effect? |
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Term
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Definition
| what can provide uniform distribution of lighting but limited to low-rise buildings |
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Term
clerestories
interior diffusers
splay openings
judical placement will avoid glare |
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Definition
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Term
| indoor illuminance / outdoor illuminance |
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Definition
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Term
| in cloudy sky and clear sky conditions |
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Definition
| when do you use the daylight factor? |
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Term
| sky, external reflectance, internal reflectance |
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Definition
| what sources does daylight come from? |
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Term
|
Definition
| portion of daylight illuminance received directly through a window minus the light losses |
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Term
| externally reflected component ERC |
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Definition
| daylight reflected from exterior obstructions to the window |
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Term
| internally reflected component IRC |
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Definition
| light that reaches the task comes from secondary sources |
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Term
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Definition
| there is adequate daylight on the workplane for a distance from the window equal to the head height of the window above the work plane |
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Term
| 15' deep from the window is adequately lit, next 15' zone is partially daylit, anything further gets no daylight |
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Definition
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Term
|
Definition
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Term
|
Definition
| predicts the minimum DF for a point 2 feet from the rear wall opposite the window |
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Term
on-off manual system
multi-level on off
continuous dimming
occupancy scheduling
luminance maintenance
load shedding |
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Definition
| simple energy saving strategies |
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Term
|
Definition
| individual or grouped fixture |
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Term
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Definition
| zoned system with control of small groups fixtures |
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Term
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Definition
| installation more costly but can handle large number of fixtures; made possible by dimmable ballasts for fluorescents |
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Term
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Definition
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Term
|
Definition
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Term
|
Definition
| peak demand monitoring, timers |
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