Page 74 - Teiber Light Bulbs 2013

74 Light Bulb Resource Guide > Fluorescent

Color temperature and CRI are two factors that determine a lamps color performance. Color temperature indicates
whether it has a warm, natural or a cool color appearance. CRI indicates a lamps relative ability to render the colors
of objects naturally and vibrantly.

Color Temperature
and the Color of Light
100
*-9 /
Slight differences in the color makeup /,1‡
" /," ÊnÈx of light are measured using the color 95
" /," ÊÇÈx temperature scale. "Warm" light sources 90
- ,ÊÈxää have a low color temperature (2000-
3000K) and feature more light in the red/ / , 85
orange/yellow range. Light with a higher , 80
color temperature (>5000K) features more
blue and is referred to as "cool." Modern 75
lighting technologies can precisely control
the color temperature of uorescent 70
and some HID lamps, allowing the users -/ , 65
+ Ê / " /," ʙxä to select a color temperature to suit a / , 60
" /," Ênxä particular application.
" /," ÊÇxä 55
" /," Ên{£ 50
" /," ÊÇ{£ CRI and the Color of Things
* /," Ên{£ 45
1 18Ên{£ The Color Rendering Index measures the
-1* , - ,Ê{£ää effect a light source has on the perceived 40
/ ,
" /," ÊnÎx color of objects and surfaces. High CRI 35
" /," ÊÇÎx light makes virtually all colors look natural
/ , * /," ÊnÎx and vibrant. Low CRI causes some colors 30
*,"‡/ 1 18ÊnÎx to appear washed out or even to take on
- ,ÊÎxää 25
M / , a completely different hue. Incandescent 1 18
, lamps have a CRI of 95+. The OCTRON 20
*-9 / " /," ÊnÎä XPS 3500 uorescent lamp has a CRI of * 1-É "
/,1‡ " /," ÊÇÎä 15
* /," ÊnÎä 86. However, because the OCTRON lamp
- / 1 18ÊnÎä produces more light in the blue portion of 10
- ,ÊÎäää the spectrum, it enhances colors in the
green, blue, violet and magenta range. 5
1 18 " /," ÊnÓÇ
* 1-É " 1 18ÊnÓÇ 0

Color Temperature Guide CRI Comparisons
œœÀÊ
Temp Range vviVÌʜ˜Ê œœÀ /Þ«ˆV>Ê ««ˆV>̈œ˜ , Ê,>˜}i Rating /Þ«ˆV>Ê ««ˆV>̈œ˜
Warm Enhances Red & Orange Restaurants 80+ Excellent Retail (displays, stores and shops)
(Below 5000K) Dulls Blues Specialty Shops/Lobbies Showrooms / Restaurants / Executive
Adds Yellow tint to Executive Of ces Of ces / Conference rooms / Lobbies
Whites & Greens
Residential
Fluorescent Natural Bassically neutral Retail Stores Èäqnä Good Ofces / Classrooms / Security lighting /
Supermarkets / Manufacturing areas /
(3500-3900K) Enhances most colors
Supermarkets
High bay retail / Large scale exteriors
equally
Showrooms
(sports arenas)
œiÃʘœÌÊi“« >ÈâiÊ
either Yellow or Blue
Cool
Enhances Blues
Hospitals
Dulls reds
(4000K +)
Parking lots
Imparts Bluish tint to Ofces/Schools <60 Poor Street lighting / Warehouses /
Manufacturing Areas
Whites & Greens Commercial Kitchens