Miory Kanashiro
Lighting/Electrical
Rosegarden Branch Library, San Jose, CA
Spring 2004
The Children’s storytelling area
Purpose of Space
This area has a circular seating pattern, in different levels going up. Its intended
use is for librarians, parents, or young adults to read to children. While it’s not being used
for storytelling in groups, it may also be used as a sitting area where children can sit and
read a book. Along the south wall, there are also bookshelves where the patrons can find
picture books.
Lighting Concept
This storytelling area has a more fun look. Its different layout and design
provide a school oriented approach but at the same time make it creative and enjoyable
for children. The ceiling also is composed of a circular dropped ceiling over it, which is
shaped as a donut. This dropped ceiling holds color changing LED’s which will create the
mood with its bright colors on the ceiling. The seating area back is made of the same
material as the drop ceiling which is a luminous and transparent surface which allows light
to go through, and there are LED’s located inside thesis back where the patrons can enjoy
the color environments created by these lights.
Dimensions
This area has a square-like geometry, located in the north west area of the second
level and has access to the family place, children’s circulation and has a arched pattern in
different levels in the middle where children can sit.
Perimeter: 30x25.6x30.1x26.8 ft aprox
Area: 840.76 sq ft
Floor Plan
Miory Kanashiro
Lighting/Electrical
Rosegarden Branch Library, San Jose, CA
Spring 2004
Finishes
Floor
CT1
Material
Carpet tile-pop circles
Manufacturer
Interface
CT3
Carpet tile-superflor
Interface
CT4
Carpet tile- superflor
Interface
CT5
Carpet tile -superflor
Interface
R7
Rubber floor
Atmosphese
B2
Wood
color
100464
Right-on (red)
6099164
Pacific sunset (orange)
609162
Primavera (green)
609158
Kingfisher (blue)
Starlight TM 987
Color take 2
maple
Miory Kanashiro
Lighting/Electrical
Rosegarden Branch Library, San Jose, CA
Spring 2004
Walls
Ceiling
CP1
Cement plaster (stucco)
CP2
Cement plaster (stucco)
SL1
SL2
W4
Slatwall
Slatwall
Wood
AC4
Open
AC5
Gypsum board
Suspended grid and
lay-in tile
AC6
Integral colored, color
to match P4
(sand finish)
Integral colored, color
to match P1
(sand finish)
Display warehouse
Display warehouse
Color: Maple
Groves: clear anodized
To match wall color
Baltic birch (plywood)
Open to structure with
acoustical spray on paint
P1
Painted gypsum board
Armstrong
Furnishings
There are bookshelves on the south side of the area (to the left in the rendering
provided), which contain picture books. In the middle of the area there is a seating area
that protrudes from the floor. The back part is made out of a translucent material that has
69% transparency and will “glow” with the LED lights inside it. The seating area is located
right inside the back part and is shaped the same, allowing people to sit there when
reading or listening to stories.
Daylighting
In this area, there are windows on the north side providing daylight and at night
some light from the exterior luminairs. There are no skylights.
Lighting Controls
The control device used in the children’s computer area of the library was the
manual on/sched off (8am-10pm) type and it uses a time switch with manual switch
override. This area also has a new control system that will use DMX 512 color kinetics
controller in order to do the color changing with the LED lighting.
Ceiling plan
Miory Kanashiro
Lighting/Electrical
Rosegarden Branch Library, San Jose, CA
Spring 2004
Fixtures
Description
Fixture Code
Mounting
Lamp Watts
Lamp Type
Ballast
Volts
Elegant low profile spun steel 3 1/2" deep x 33" diameter housing
encircles a 12 1/2" diameter reveal (open center).
B
pendant
6 lamp BIAX 40 watts
6FT40W
(3) 2 lamp electronic ballast, high power factor.
120
Miory Kanashiro
Lighting/Electrical
Rosegarden Branch Library, San Jose, CA
Spring 2004
Left rendering: Scion round pendant in middle and five wall washers near south wall.
Description
CCT
Fixture Code
Mounting
Power
Consumption
Lamp Type
Controls
Volts
12” color cove LED’s – two piece vented plastic – 45 LED’s (15 red, 15
green, 15 blue) with asymmetric direct illumination – Color Kinetics
1,000-10,000 K
C
On dropped ceiling (surface)
Max 6 Watts
LED
DMX 512 and iPlayer 2.0
120
Miory Kanashiro
Lighting/Electrical
Rosegarden Branch Library, San Jose, CA
Spring 2004
Description
Fixture Code
Mounting
Lamp Watts
Lamp Type
Ballast
Volts
Wall washer
A
Recessed
1 lamp, 42 watts
42 W CFL
Electronic ballast
120
Power Density
the allowable power density for a library with stacks is 1.2 W/sf according to Title 24
IES Criteria
Reading: printed tasks
Appearance of Space and Luminairs
Very important
This space should look aesthetically pleasing, since this is where children will have
books read to them and will be reading themselves when they’re older. In order to keep
the children’s interest on the area and provide a comfortable and pleasing atmosphere,
the storytelling space should have an inviting and original look to it.
Miory Kanashiro
Lighting/Electrical
Rosegarden Branch Library, San Jose, CA
Spring 2004
Light Distribution on Surfaces
Important
Light distribution on this space should be even in order for people to be able to
read at ease. The storytelling area has different levels in a circular pattern, so this area
needs even lighting throughout the space.
Reflected Glare
Very important
At the storytelling area, reflected glare might be an issue since it is close to some
windows and these might reflect the light coming from the light fixtures. Bare lamps should
be avoided and placement of luminairs should be considered.
Shadow
Somewhat important
There should not be shadows on this area, or kept to a minimum since children or
parents shouldn’t be required to move in order to have a better vision of the book they’re
reading. Shadow patterns would also be distracting and would provide an unpleasant
view.
Source/Task/eye Geometry
Somewhat important
The source of the luminairs in relation to the eye of the person is somewhat
important, but due to the composition of the area and the ceiling architecture, the
possibilities for luminair placing is a bit limiting.
Horizontal Illuminance
Important: 300-500 lux (30-50 fc)
There should be enough light on the area in order for adults to read to their
children as well as for children to read storybooks. There should be enough illuminance as
well in case people want to read books with fine print.
Miory Kanashiro
Lighting/Electrical
Rosegarden Branch Library, San Jose, CA
Spring 2004
Title 24 Allowed Lighting Power
Library:
Reading areas: 1.2 W/sqft
Label
Description
Lamp
Ballast
Input
Watts
Total
No
Used
Watts
Wallwasher
Wallwasher
Ceiling recessed
One CFM 42W
GX24q-4, 3500K
CCT, 82 CRI, 3200
lumen
Smartmate
Programmed Start
4-pin Triple Tube
[CFTR42W/GX24q]
46
5
230
icove12
LED
LED 12 inch total
length (45 LEDs: 15
red, 15 blue, 15
green)
-
6
41
246
Pendant
Scion
indirect/direct
pendant
3- 26 W lamps
33
1
33
Total
Watts
509
Dim (in ft)
Power
Density
Height
(lm/sq.
ft.)
0.3525
15.5
Length
38
Width
38
Label
Ceiling Washlight
icove12
Pendant
Area (sq. ft)=
1444
Luminaire LLF Table
Cln.
Maint.
Interval
Cat.
Lum Cat.
RSDD
Other
Total
LLF
IV
SemiDirect
0.92
1
0.68
12 months
VI
Indirect
0.88
1
0.68
12 months
II
Dir/Indirect
0.915
1
0.78
BF
LLD
LDD
0.98
0.86
0.88
12 months
1
0.9
0.86
1
0.94
0.91
Miory Kanashiro
Lighting/Electrical
Rosegarden Branch Library, San Jose, CA
Spring 2004
Room Cavity
Ratio:
5
Height
Length
Width
15.5
29
29
Expected Dirt
Depreciation
10%
Ceiling Washlight
LED icove12
pendant
Initial
Lumen
3200
51
2900
Lightscape Rendering
LLF
0.68
0.68
0.78
Design
Lumen
2176
35
2262
Miory Kanashiro
Lighting/Electrical
Rosegarden Branch Library, San Jose, CA
Spring 2004
Miory Kanashiro
Lighting/Electrical
Rosegarden Branch Library, San Jose, CA
Spring 2004
Miory Kanashiro
Lighting/Electrical
Rosegarden Branch Library, San Jose, CA
Spring 2004
without the dropped ceiling
Miory Kanashiro
Lighting/Electrical
Rosegarden Branch Library, San Jose, CA
Spring 2004
with dropped ceiling
Miory Kanashiro
Lighting/Electrical
Rosegarden Branch Library, San Jose, CA
Spring 2004
For the storytelling seating
For the dropped ceiling LEDs:
Location of fixtures on top views:
Miory Kanashiro
Lighting/Electrical
Rosegarden Branch Library, San Jose, CA
Spring 2004
Pendant is located in the center
Miory Kanashiro
Lighting/Electrical
Rosegarden Branch Library, San Jose, CA
Spring 2004
above: LEDs (icolorcove12”) in the seating area.
Design Conclusions
This area has good illuminance values, and it is pretty uniform. The bookshelves along the
wall also provide good illuminance in order to be able to read the titles. The LEDs provide
the seating area to glow in different colors. Although it can’t be seen clearly using
Lightscape, it should work due to the transmittance and transparency of the material (sand
blasted glass). The power density was acceptable and it actually went down from the
original design. So there is energy conservation as well as better aesthetic quality on this
area. There were various changes in this space, since it is the most “fun” area in the
library. This semi-square area has a circular (half-moon) shaped seating area made out of
½” sandblasted glass. This material diffuses and transmits the LEDs which are inside it as
Miory Kanashiro
Lighting/Electrical
Rosegarden Branch Library, San Jose, CA
Spring 2004
shown on the detail above. This seating area back rest will glow from within and change
colors as time passes by. This should be a major attraction for young kids. The circular
dropped ceiling should change colors as well and hope that it also makes kids more eager
to come back to the library and read.