TUBE LIGHT

The light source mainly used in the Colour Matching Cabinets is as below.

•  D65 (6500K) -A light bluish colored light source used in color matching applications of paints, plastics, textiles, raw inks, and other manufactured products. It is the only daylight source that was actually measured. The other daylight sources(D75 and D50) were mathematically derived from these measurements. It accentuates blue and subdues green and red. Commonly used as a primary light source in color measurement instrumentation.
• D75 (7500K) -A bluish colored light source originally used for grading cotton and other evaluation applications. It has been replaced by D65 as the standard source for these applications. It accentuates blue and subdues green and red. It is derived from the light coming in a north facing window in the northern hemisphere at noon at various times throughout the year. It is commonly called North Sky Daylight.
• D50 (5000K) -A near white light source used in the evaluation of graphic arts and imaging applications. It has similar amounts of red, green, and blue energy. It neither accentuates nor subdues color, a prime requirement when viewing press sheets and original images (i.e., photographs) since they usually have many colors within the product to be evaluated.
• UVB (Ultra Violet Black) - Light energy not normally visible to the human eye, but which is present in natural daylight. UV energy has the ability to excite certain substances (dyes/pigments/chemicals) within a sample causing them to emit light in the visible spectrum, usually in the blue region.
• CWF (Cool White Fluorescent) - A wide band single phosphor fluorescent source commonly used in commercial lighting applications in North America. It is characterized bye mitting high amounts of green energy, with a color temperature of approximately4100K. It has a CRI or approximately 62.
• TL84 - A narrow band tri-phosphor fluorescent source originally designed for commercial lighting applications outside North America. It is characterized by emitting high amounts of green energy, with a color temperature of approximately 4100K.It has a CRI of approximately 86.
• TL830 - A narrow band tri-phosphor fluorescent source originally designed for commercial lighting applications outside North America. It is characterized by emitting high amounts of yellowish red energy, with a color temperature of approximately3000K. It has a CRI of approximately 86.
• UL30 (Ultralume-30)- A narrow band tri-phosphor fluorescent source originally designed for commercial lighting applications in North America where energy savings is required. It is characterized by emitting high amounts of yellowish red energy with a color temperature of approximately 3000K. It has a CRI of approximately85.
• UL35 (Ultralume-35) - A narrow band tri-phosphor fluorescent source originally designed for commercial lighting applications in North America where energy savings is required. It is characterized by emitting high amounts of reddish yellow energy with a color temperature of approximately 3500K. It has a CRI of approximately85.
• Incandescent and Tungsten Illumination: A typical light bulb found in the home is an incandescent tungsten lamp. It uses a tungsten filament that will glow when electricity is passed through it.
• Tungsten A -is used primarily in the photographic, film and video industries where a whitish source and continuous light output are required. It is not commonly used for color matching applications.
• Tungsten A-3200K- Red/Yellow Photographic imaging applications.
• Illuminant A-2865K- Yellowish Red Standardized source and illuminant for color matching.
• Horizon-2300K- Reddish Source described in older specifications and used for color matching applications.