LED Luminaries

LED news and insight from our technology editor Steve Bush, who has been messing with LED lighting for more years than he would care to remember.

Silicone Lenses for COB LEDs

Khatod silicone lens for CoB   Khatod has introduced silicone lenses for CoB arrays, called SIO3.

The material has been chosen for its: sustained transparency over years, resistance to yellowing, UV-resistance, optical efficiency, lack of birefringence, temperature resistance (-40 to 150°C, 200°C peak), and flexible at low temperatures.

Designed for streetlights, depending on the LED used, they can comply with IESNA Standards: Type I, Type II, Type III, Type IV, Type V, short or medium light distribution.

These are large beasts: 111x110mm and around 35mm high.

Khatod silicone lens for CoBKhatod silicone lens for CoBThe one pictured above is the PL1765SR-Type I which makes a 150×135° beam (to 50%) from a 23mm diameter CoB (145×160° to 10%). See left and right for beam distribution and a line drawing.

Application is also expected in: parking areas, petrol stations, sport lighting, parks, gardens, pathways, canopies, shopping centres, offices, lifts, shop windows, and everywhere else…

“SIO3′s immersion-proof hydrophobic property makes these lenses particularly fitting for damp and wet environments. Indoor pools are a typical application,” said Khatod. “Also, their explosion-proof and shock-proof properties make SIO3 safe and reliable in hazardous environments such as mines. They do not shatter in the event of impact, flashover or vandalism.” – so no need for a sealing gasket or protective cover.

Khatod silicone lens for CoB

Beam Angles: 1 rotosymmetrical, 3 asymmetric, 1 axially symmetrical in x, y (rectangular spot).

They are designed and made in Italy.

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