Simple, Elegant, Effective Library Task Lighting
●Modern, Minimal Appearance
Architectural Integration
●User Adjustable
●Tool Free Installation and
Maintenance
●Affixes Easily Without Damaging
Tables
●Rugged Steel Construction
One of the most outstanding trends in
contemporary architectural design is an
elegant minimalism. SPAN is designed to
pack a maximum amount of functionality into
a compact, simple package. This expression
of functionalism allows SPAN to compliment
buildings of this type without adding visual
complexity. At the same tine, the anachronistic
austerity of the design allows it to integrate with
a plethora of other contemporary styles without
competing with the architecture.
SPAN gives readers four degrees of easily
and intuitively controlled motion in order to
maximize the effective illumination of the task
and to minimize veiling reflections.
SPAN is designed for durability, using rugged
all-steel construction to stand up to years
of public use. All wiring is internal and no
complicated electrical connections or joints are
used. The ballast is hidden within the base
of the lamps but slides out for easy service or
replacement. Relamping is tool-free, fast, and
simple.
APPEARANCE
With Four Degrees of Motion SPAN Can Accommodate Almost Any Reading Position
Rotate
Elevate
Swing
Pivot
SPAN’s entire optical armature is capable of
rotating nearly 90 degrees in either direction.
The base is capable of adjusting from 500mm
to 900mm in height to accommodate different reading angles and to allow users to minimize veiling reflections.
The optical armature can swing a full 360
degrees to minimize glare, veiling reflections, and shadows on the task.
The arm can pivot in any direction, providing
readers with a variety of heights and angles
to choose from. SPAN can also fold for ease
of storage or shipping.
Optical System Diagram
Optical Control
Estimated Light Distribution
Light Distribution
Ventilation Holes
Powder Coated Steel Shield
Wiring Integrated
With Reflectors
Stainless Steel Reflector
Integrated Punched Baffles
While tight optical control of compact fluorescent lamps is difficult to attain, SPAN uses a
combination of stainless steel reflectors and
punched baffles to direct the light and reduce
the possibility of glare.
SPAN’s optical system is designed to cast a
diffuse blob of light over the reading area.
Additionally, there is an insignificant uplight
component included for both aesthetics and
as an indication that the light is on.
Convection Cooling
Visual Comfort
As the High Output lamp begins to warm, it
will heat the air inside the shield, and that air
will begin to rise. Thanks to ventilation holes
in the top of the shield, this air is expelled,
and cool air moves in through the baffles
to replace it. This cycle can also reduce
Luminaire Dirt Depreciation. The vent holes
are positioned to allow a small amount of
light to escape, which can indicate that the
lamp is on, even when SPAN is directed away
from you.
The baffles and reflectors minimize light escaping at steep angles to the fixture in order
to reduce glare. The bare lamp, which being
a T5 can cause discomfort glare. The flexibility of the system allows users to manually
adjust the fixture to reduce veiling reflections on reading materials, even in a number
of different positions.
FLEXIBILITY
SPAN’s Powder Coated Steel Construction is Rigid and Durable
32 mm 38 mm
595 mm
45 mm
S - ‘Swing’ Bearing Assembly
45 mm
P - ‘Pivot’ Bearing Assembly
R - ‘Rotate’ Bearing Assembly
W3
L1
L4
L2
L5
L6
Continued to left
W2
432 mm
R
B2
E - Elevator Assembly
E1- Elevation Adjustment Knob
E2- Elevator Control CAM
E3- Teflon Sliders
P
641 mm
L - Optical Assembly
L1- Reflector
L2- Outside Lamp Mounting
L3- Inside Lamp Mounting
L4- 14w T5 Lamp
L5- Lamp Shield & Baffle
L6- Rotation Adjustment Knob
L3
L
L2
470 mm
E1
76 mm
L5
C3
L6
C1
102 mm
B
B4
W4
C2
B3
Continued to right
B5
W1
E
E3
E2
C4
B1
L4
L1
B3
S
W - Electrical Assembly
W1- Incoming AC Power
C4- Rotary Power Switch
B3- Ballast
W2- Coiled Wire
W3- Inside Lamp Socket
W4- Outside Lamp Socket
B - Base Assembly
B1- Lower Base Shield
B2- Upper Base Shield
B3- Ballast
B4- Elevator Control Slider
B5- Elevator Slider
C - Clamp Assembly
C1- Clamp Adjustment Knob
C2- Clamp Disk With Pad
C3- Power Switch Knob
C4- Rotary Power Switch
C3
C4
C
C2
C1
ASSEMBLY
Quick, Tool-Free Relamping and Cleaning Saves in Maintenance Costs
Lamps & Relamping
1.
SPAN is designed for use with a single
21.6 inch 14 watt T5 linear fluorescent
lamp. This lamp’s rated mean lumen
output is 1270 lumens, which is calculated to provide between around 750
lux over a one meter square work area.
As explained below, these estimates are
not (and cannot) be overly exact given
SPAN’s extreme flexibility.
2.
In some applications, greater light
output might be required or desired.
Alternate lamps include the 21.6 inch
24w “High Output” T5. Using this lamp
is estimated to provide 1100lx on the
work plane. For energy conservation
concerns, it is recommend that application of high output lamps be limited to
situations where ambient light levels are
extremely low or elderly patronage is
anticipated.
3.
To Relamp or Clean:
This plan view of SPAN in action is intended to give
a rough impression of the fixture’s light distribution
in practise.
1.
Unscrew Rotation
Adjustment Knob and
Lamp Shield
2.
Slide Lamp Shield off
of Optical Armature
3.
Replace Lamp or
Clean Optics
Photometrics
Cleaning & Relamping
In the renderings to the left case, SPAN
has been ‘swung’ to provide over - the
- shoulder reading light and has been
‘rotated’ about fifteen degrees from
vertical. SPAN’s efficiency factor is estimated at sixty percent.
SPAN is designed to allow easy, tool-free
maintenance and cleaning. The Lamp
Shield is simply unscrewed and slid away
to reveal the lamps and optics.
Since SPAN is designed to ‘rotate,’ ‘elevate,’ ‘swing,’ and ‘pivot,’ work plane
illuminance can very. In this case, SPAN
has been positioned at 750mm over the
work plane.
100lx
500lx
1000lx
This same plan view has been overlaid with a computer generated IsoLux
diagram to more accurately predict light
density.
No-Damage Clamp System
SPAN’s integrated table clamp can mount
on the edge of tables from 10 to 65mm
in thickness without tools and in seconds.
Like a simple ‘C-clamp,’ Simply turn the
knob at the bottom to adjust to table
thickness, and then tighten. Non-slip
neoprene rubber pads ensure a tight grip
and prevent damage to the table top from
abrasive metal elements.
FEATURES