been used to realize specialized optics for
automotive and other applications.
At LFI, Dow announced the new MS-4002,
MS-4022, and MS-4007 moldable optical silicone formulations. The new products yield a
surface that more closely resembles a plastic
surface — smoother and less tacky than prior
silicones. Still, the material can be molded with
special mechanical features such as undercuts
that are impossible to mold in rigid plastics.
Khatod is one commercial optics manufacturer that is using silicone to produce
LED lenses and optics of various shapes and
sizes. At LFI, the company demonstrated its
SIR50 (silicone internal reflection) lenses
that can be used with COB LEDs with a
light-emitting surface (LES) between 6 and
9 mm in diameter. The lenses target applications such as MR16 lamps and can deliver
narrow, medium, and wide beam patterns.
Tunable lighting products
Now let’s turn to end lighting products, and
perhaps the most compelling products on
the show floor were tunable products —
both color and white-point tunable. The
Symmetry product from Visa Lighting was
especially compelling in round form with the
LED sources completely hidden. And as we
described in an earlier news article, the broad
white-point tuning range from 1650K to
8000K CCT caught our eye ( http://bit.ly/2tX
Qlxc). That range delivers even more flexibil-
ity for human-centric lighting (HCL) or light-
ing for health and wellbeing. We also covered
Acuity and Philips Lighting products in that
earlier article. The Acuity technology remains
very impressive, and would
deserve more coverage here
except for the fact that we
covered it extensively last
year ( http://bit.ly/2cfn7U2).
There were far too many
tunable products for us
to detail here, but we will
describe a few of the others
that stood out. USAI Lighting demonstrated a technology that it calls ColorID_
Complete, intended to allow
people to choose from more
than 170 color formulas to suit their needs and
whims. The technology works with the company’s Infinite, Color+, and Color Select systems. The Infinite system, for example, is used
to paint walls using lighting products such as
the BeveLED WRGB Infinite Color+ luminaire.
Hubbell has also rolled out a tunable technology platform that it calls SpectraSync.
Initially, the company will support Dim to
Warm (2200K to 3000K), Scheduled White
(programmable variable intensity and white
from 2700K to 6500K), and Tunable White
(user-configurable variable intensity and
white from 2700K to 6500K) modes. Hubbell said it will later add Dynamic Spectrum
with color-tunable features. The SpectraSync technology will initially be available in
Prescolite downlights, Litecontrol pendants,
and Columbia troffers.
Lighting for health
There’s a fine line between tunable prod-
ucts designed for mainstream architectural
spaces and others designed for healthcare
applications. Hubbell makes both. And a
product we saw, and were impressed with,
last year at LFI was again demonstrated this
year with a promise of near-term commer-
cial availability. The Remedi luminaire (Fig.
4) is designed to be wall mounted above the
patient bed in a hospital room. The fixture
has three optical chambers and settings for
examination (direct light that’s bright and
cool), reading (more pleasing direct light),
and warm ambient indirect light for relax-
ation. The product is a great example of
The tunable concept also impacts the controls space. In many instances, lighting manufacturers are using simple dual 0–10V dimmers to enable separate setting of intensity
and chromaticity in tunable products. But
accurate and optimal deployment of tunable products will require more sophistication — read digital control, a graphical user
interface (GUI), and programmatic capabilities. Lutron contributed a feature article
describing the problem in 2016 (http://bit.
ly/28Px7Vk) and then an opinion column
calling for digital controls more recently
At LFI, Lutron announced that its Quantum 3. 3 lighting control and energy management system now has integrated support for
tunable-white lighting. The platform enables
scheduled programmatic control and override
in individual spaces with a smart device GUI
(Fig. 5) or wall-mounted control. Lutron said
the product is ready for designers to specify
now and will ship commercially in September.
FIG. 4. Hospital patient rooms can be lit for examinations, reading, or relaxation using
the single Remedi luminaire from Hubbell.
FIG. 5. The Quantum smart device app
from Lutron enables precise control of
tunable lighting products.