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Excellent colour rendering, high lumen levels
and continuous operation with no degradation in quality |
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There is a lot of debate over the true
usefulness and practical application of Colour Rendering
Index (CRI). Incandescent bulbs have a CRI rating of 100,
yet are far from ideal for colour rendering and matching.
Why? With a colour temperature of only 2700k they are
far too weak at the blue end of the spectrum making it
next to impossible to distinguish between various shades
of blue. The CRI rating of 100 simply means that 8 colours
(see fig.1) look exactly the same as they would under
a black body radiator at 2700k. |
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The same can be said for lamps that exceed 6500k in colour
temperature as they are too weak in the red end of the spectrum,
making reds and oranges appear too similar creating a "washed
out" appearance. The northern sky with a colour temperature
of about 7500k and a CRI of 100 is not necessarily the ideal
colour rendering light source either. An ideal light source
for colour rendering will have both a colour temperature similar
to daylight (5000K to 6000K) and a high CRI value (>85).
Regardless of whether or not CRI is the fairest measure of
colour rendering for luminaires, it is important for specification,
compliance and certification purposes. The US Department of
Energy’s Energy Star program, offers generous manufacturer
and consumer enticements for developing and installing and
high-efficiency lighting products. CRI is one of the criteria
, so you need to ensure you address CRI and efficacy issues
at design time. For example, to be Energy Star listed, kitchen
luminaires and portable task lamps need a CRI of 80, outdoor
pathway lights and ceiling down lights require a CRI of 70.
Common lamp types and their typical ratings and film performance.
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Sulphur Plasma
CCT: 6000K
CRI: 86
Lumen: High Level
Lighting: Continuous
Good for Movie & Photo
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Xenon lamp
CCT: 5600K
CRI: 85
Lumen: Medium Level
Lighting: Flash
Good for Photo only
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Metal Halide
CCT: 4500K
CRI : 60
Lumen: Medium Level
Lighting: Continuous |
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Halogen
CCT: 3200K
CRI: 95
Lumen Medium level
Lighting continuous
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Incandescent
Light Bulb
CCT: 2700K
CRI: 100
Lumen: Low Level
Lighting: Continuous
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Excellent Light Projection
Sulphur Plasma spectrum is full and continuous and
excellent for all types of photography and filming.
Measured at 8m from source a 1.2KW Xenon lamp measured
10,000 lumens on the subject. When the 1.2KW Xenon
was replaced with a 1.3KW PI-VL greater than 50,000
lumens was measured on the subject. Source: TV Film
Studio Hamburg Germany 2008. |
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German Attention to Detail
A beautiful, full and continuous spectrum, the closest
to natural daylight achievable. Because this is a
wirelessly powered light source with no electrodes
the plasma inside the bulb is never contaminated by
burnt or damaged electrode debris. The light quality
remains pure and perfect, unchanging and no degradation,
a superiorly constant output. The special ingredients
inside the bulb are >99.6% pure, the German optics
(patented) are the best.
No other singular artificial light source is capable
of delivering so much light from such a small point
of source, lending itself to many focal variances.
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Sulphur
Plasma - Application |
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Continuous
Full Spectrum Light (CFSL)
Circadian Rhythms -Natures
Time Keeper |
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Light
Pipe
Large and small light
pipes and light distribution tubes that can be illuminated
by Sulphur. |
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Horticulture
Growth Under Metal Halide
and Microwave Powered Sulphur Lamps |
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Aquaculture
Reversing the spread
of hunger is one of humanity’s paramount challenges.
It will mean overcoming the fatalistic belief that chronic,
persistent hunger is inevitable. |
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Photography
& Projection
Excellent colour rendering,
high lumen levels and continuous operation with no degradation
in quality. |
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Commercial
Demonstration and Assessment
of a Sulphur Lamp Retrofit Lighting System at Hill Air
Force Base, Utah |
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Gallery
Sulphur Plasma Lighting
Installations
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Horticulture
Sulphur Fertilizer
Application in Crop Production
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