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Copyright SLP UK Ltd 2013. LED sources are a unique source of glare. The Diagram displays the most common fluorescent lighting source. Copyright SLP.

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Presentation on theme: "Copyright SLP UK Ltd 2013. LED sources are a unique source of glare. The Diagram displays the most common fluorescent lighting source. Copyright SLP."— Presentation transcript:

1 Copyright SLP UK Ltd 2013

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3 LED sources are a unique source of glare. The Diagram displays the most common fluorescent lighting source. Copyright SLP UK Ltd 2013

4 This diagram displays a typical LED light source. Copyright SLP UK Ltd 2013

5 18 W T814 W T5Single LED Chip Luminous area m 2 0.0460.0270.00004 Lumen output14501200100 Surface Brightness Cd/m 2 10,00015,0008,300,000 Copyright SLP UK Ltd 2013

6 T8 P12 Type prismatic Prism size Circa 5mm Easily extruded 15,000 prisms on A 2 ft. panel T5 P42 Type Microprism Prism size less than 2mm Practical limit for extrusion 750,000 prisms on a 2 ft. panel LED Nanoprism Prism size 0.5 mm Injection moulded 1,500,000 prisms on a 2 ft. panel Copyright SLP UK Ltd 2013

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8 Unique 2 surface design Nanoprism outer surface is a custom design moulded prism The rear surface is a special texture which acts in conjunction with the prisms Copyright SLP UK Ltd 2013

9 High Efficiency Rear surface texture minimises reflection Rear surface texture maximises collection of off axis light rays Injection moulded sharp minimum radius front Nanoprism maximise transmission Injection moulded flat faces to Nanoprism ensure minimum reflection Precise relation between rear texture and front prisms minimises losses Copyright SLP UK Ltd 2013 measured under practical conditions as the difference in Lumen output between a practical luminaire without the panel and the same luminaire with the panel added

10 Precise Photometric control Typical polar curve 600 x 600 Recessed Module 2200 lumen output Copyright SLP UK Ltd 2013

11 Elevation angle 70% Opal cd/kLm Nano cd/kLm Nano % lower 6097.595.02.5 6582.171.013.6 7065.850.822.8 7549.134.130.6 8033.220.538.2 8516.38.646.9

12 Copyright SLP UK Ltd 2013 From the graph above we can see that the limit for meeting 3000cd/m2 is 14200 Lumens per m2 input from the source. For a luminous area of 585 x585 mm this equates to 4800 Lumens input.

13 Nanoprism Practical application To obscure source D S. In practice D minimum should not be less than 25 mm Provided these guidelines are used the resultant photometry will be as published and the LED point sources will not be individually visible Copyright SLP UK Ltd 2013

14 1000 750 500 300 200 Illuminance [lx] Copyright SLP UK Ltd 2013

15 General Calculation algorithm used Average indirect fraction Height of evaluation surface 0.75 m Height of luminaire plane 2.73 m Maintenance factor 0.85 Light flux factor (see maintenance plan) 1.00 Total luminous flux of all lamps 110000 lm Total power1000.0 W Total power per area (144.00 m²) 6.94 W/m² (1.33 W/m²/100lx) Evaluation area 1 Reference plane 1.1 Horizontal Em 522 lx Emin 451 lx Emin/ Eav (Uo) 0.86 UGR (7.9H 7.9H) <=19.3 Position 0.75 m Copyright SLP UK Ltd 2013

16 1000 750 500 300 200 Illuminance [lx] Copyright SLP UK Ltd 2013

17 General Calculation algorithm used Average indirect fraction Height of evaluation surface 0.75 m Height of luminaire plane 6.00 m Maintenance factor0.80 Light flux factor (see maintenance plan) 1.00 Total luminous flux of all lamps 125000 lm Total power1425.0 W Total power per area (144.00 m²) 9.90 W/m² (1.83 W/m²/100lx) Evaluation area 1 Reference plane 1.1 Horizontal Em 541 lx Emin 385 lx Emin/ Eav (Uo)0.71 UGR (2.5H 2.5H)<=18.3 Position 0.75 m Copyright SLP UK Ltd 2013

18 High efficiency means less luminaires needed High efficiency means lower power LEDs for the same effect Reduces CO2 emissions Harnesses the long life of LED technology to reduce maintenance and environmental impact

19 620 x 620 mm Flat sheet. Can be cut to fit surface and recessed modules for retail and commercial luminaires. Other sizes of flat sheet available. Nanoprism can be custom moulded onto new diffusers to control any LED Product. Moulded bulkhead diffusers Linear modules Decorative bulkheads Floodlights Copyright SLP UK Ltd 2013

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