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A foot-candle (fc) is the unit of measure for the density of light as it reaches a surface. One lumen per square foot. 1 foot-candle = 10.8 lux.
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Last Updated By:
Jo Rossman
On:
Apr 30, 2012 4:08 PM
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A bulb, also called a lamp, is referred to by one or two letters,
indicating the shape, followed by a number, indicating the diameter, in
eights of an inch. When you think of a “light bulb,” you probably think
of the A19 bulb in the top row, second from left. It is in the A
family shape and it has a diameter of 19/8 inch, or 2 3/8”. Another
common bulb is the BR30, a Bulge Reflector, which is 30/8 = 3 ¾” in
diameter. Some people separate the shape and number with a dash or a
space. EnvironmentalLights.com adopts the convention of using no dash or
space. What we call a PAR38, others may call a PAR-38 or PAR 38.
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Last Updated By:
Jo Rossman
On:
Feb 17, 2012 2:39 PM
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the MKS (meter-kilogram-second) unit of electrical
potential difference and electromotive force equal to the difference in
potential between two points in a wire carrying a constant current of
one ampere when the power dissipated between the points is equal to one
watt.
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Last Updated By:
Jo Rossman
On:
Feb 17, 2012 2:38 PM
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(often shortened to amp) a unit of electric current equivalent to a steady current produced by one volt applied across a resistance of one ohm.
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Last Updated By:
Jo Rossman
On:
Feb 1, 2012 1:43 PM
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the quantity of luminous flux emitted within a unit solid
angle (one steradian) by a point source with one candela intensity in
all directions.
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Last Updated By:
Jo Rossman
On:
Feb 1, 2012 1:42 PM
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windows above eye level that admit light into the space. Often combined with lightshelves as a daylighting strategy.
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Last Updated By:
Jo Rossman
On:
Feb 1, 2012 1:36 PM
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(often shortened to cogen) the simultaneous production of electrical or mechanical power and useful thermal energy from the same fuel/energy source
aka combined heat and power
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Last Updated By:
Jo Rossman
On:
Feb 1, 2012 1:24 PM
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(abbreviated DfD) the deliberate effort during design of a building, interior space, or product to maximize potential for disassembly and/or deconstruction
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Last Updated By:
Jo Rossman
On:
Feb 1, 2012 1:22 PM
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The metric unit of power equal to the work done at the rate of one joule
per second or to the power produced by a current of one ampere across a
potential difference of one volt.
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The number of watts an incandescent lamp would consume to produce a like
amount of light generated by a compact fluorescent or other lamp-type.
Example: a 13 Watt compact fluorescent typically produces the light of a
60 watt incandescent, or 60 Watt-equivalents. That’s why compact
fluorescents save about 75%-80% power to generate the same amount of
light as incandescents, including halogens.
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Light Emitting Diode
A type of solid-state lighting in which light is generated by passing a current through a pn (positive-negative) junction in a semiconductor.
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A white light produced by an incandescent filament lamp placed in a
quartz capsule containing halogen. Halogens are an improvement on the
incandescent light Thomas Edison commercialized over a century
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The quality of performing a useful task with a minimum of power consumed.
Energy-efficient lights have the following characteristics 1) they have
high useable light output per unit of power consumed (high luminous
efficacy), and 2) their fixtures direct the light where it is needed.
Energy efficiency can also be achieved through controls that make sure
lights are off when not needed, such as occupancy sensors and timers.
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If you want to get to first base in the bulb business, you have to get
the base to fit into the socket. The Standard “Medium” base is an E26.
Except, of course, when it’s an E27. This is what happens when different
parts of the world with different standard bases trade with each other.
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We measure light color in degrees Kelvin, the absolute temperature scale
used by scientists. A degree Kelvin is the same size as one degree
Centigrade. To convert Centigrade to Kelvin, add 273 degrees.
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The Color Rendering Index (CRI) is a measure of how well a light source
is able to show the colors of objects it illuminates. 100 is the best,
and 0 is the worst. Incandescent lights show all
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the phase of a project that occurs after schematic design and before construction documents are developed. During this phase, schematic design studies are developed into more detailed drawings illustrating
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Last Updated By:
Jo Rossman
On:
Jan 12, 2011 11:55 AM
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Dallas-based architect Bob Borson offers a humorous take on architectural lingo. See related link
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Last Updated By:
Jo Rossman
On:
Dec 6, 2010 12:33 PM
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Status:
Someone confirm this is accurate
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A glass-paneled cabinet or display case, often used to display jewelry
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Last Updated By:
Jo Rossman
On:
Nov 22, 2010 4:37 PM
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Last Updated By:
Jo Rossman
On:
Oct 18, 2010 6:31 PM
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