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Excellent colour rendering, high lumen levels and continuous
operation with no degradation in quality
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.
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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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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.
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. |
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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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