Lighting Design Lab. Energy effective practice that is better than standard practice! Who is the LDL? LEDs: A closer look

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1 Lighting Design Lab Who is the LDL? LEDs: A closer look Presented by Eric Strandberg, LC Lighting Design Lab Our goal is to promote energy efficiency through quality design 915 th Ave S x Seattle, WA x fax Energy effective practice that is better than standard practice! Lab Services include;»light Sources room w/ Color boxes»electric Lighting assistance»catalogue and text Library»Classes and Tours»Newsletter and Mailing list»web site - scale Mock-Up facility Why the buzz?» Why LED's?:» LED's have begun to light the future with their capabilities of reducing power consumption by % over conventional lighting.» Their "light" span is a minimum of 1 years for commercial usage, and a minimum of 5 years for residential applications.» Besides eliminating the environmental hazards of mercury in fluorescents,» LED's quietly illuminate with the closest look of natural daylight Everyone seem to have their hair on fire to use LEDs» GE- 1w led = 35 lumens,» 7w led = lumens ( l/w)?» w Inc = l/w» w CFL = 31 l/w» 3w T = 9+ l/w» 15w CMH = 75 l/w» LED life usually = 5, hrs» Incandescent = 1, hrs» Halogen = 3,5 hrs» CFL = 1, hrs» T fluorescent = 3, to, hrs» Induction =, to 1, hrs» LEDs have many exotic chemicals used in them and in production. Lab Territory: LED's quietly illuminate with the closest look of natural daylight Led light compared to daylight is it the same? Project OR Specifier must be in the region. LED Daylight

2 How do LEDs work? What is an LED?»Light Emitting Diode» Color» White»Like a normal diode, the LED consists of a chip of semiconducting material impregnated, or doped, with impurities to create a p-n junction. Color LEDs for beacons and signals LED basic components»led chips are made of silicone (like computer chips), and then mounted in a package that has electrical leads and sometimes heat sinking.» Just because the chips are high quality, does not guarantee that it is in a high quality package Package Chips Heat management Leds are small»getting heat away from the junction is critical to LED performance;» Life» Light output»the package is then attached to a heat sink, that then becomes a part of; either a lamp or a luminaire Managing heat in power LED systems for optimal performance When designing a solid-state solution with power LEDs, one cannot underestimate the importance of the thermal system design, as encapsulated in the phrase Think Thermal First. -Rudi Hechfellner, Technical Marketing Manager Philips Lumileds Lighting Company»Which can make for small sized fixtures and potential problems with heat dissipation LED basic components Heat management»the package then becomes either a lamp, an array or a luminaire.»definitions of these and other LED components are currently under review Array Lamp Luminaire»If the fixture/ lamp is too small, and/or the power is too high, then over heating can occur.»lumens/watt can be reduced at a # of points:» Chip has X lumens/watt» Package has less» Powersupply = less still» Luminaire = still lower l/w than the original chip. 1 watt

3 High Pressure 15ft System Watts: Beta 15ft System Watts: IntenCity 15ft System Watts: Relume 15ft System Watts: Leotek 15ft System Watts: System Watts: System Watts: Most LEDs are directional LED light distribution»the chip is located in a little reflective cup that sends the light in a direction.»but not so good for applications better suited to omnidirectional lamps. LED light distribution White LEDs»Which makes them good for applications that require a spot light.»white light LEDs are generally made by taking a blue LED and doping it with yellow phosphors Photo courtesy BetaLed LEDs and color The cool color looks like metal halide (about K), which can make them a good fit for exterior applications. Note the yellow HPS on right and the bluer LED on the left. Baseline 1 watt high pressure sodium cobra head street light High Pressure 15ft X and Y axis are in feet. Scale is in foot candles LED Roadway lights more tests Baseline- HPS» The Municipality of Anchorage, AK, USA has joined the LED City program, an international community of government and industry parties initiated by LED maker Cree Inc of Durham, NC, USA to evaluate, deploy and promote LED lighting for municipal infrastructure. The city s participation was announced in conjunction with an energy-related initiative calling for the retrofit of all, municipal roadway lights with high-efficiency LED fixtures.!!?! Metal 15ft 1st Source Induction- 15ft AITI 15ft

4 High Pressure 15ft Improving trends» LEDway- street and tunnel luminaires» Uniformity, control, and white light improve safety.» Modular Design» Die-Cast and Extruded-Aluminum Housing, Wet Listed» Optional Backlight Shield» Two-Level Option» UL, Class I» IES Full Cutoff Optics 7 watts Promising results Could this have been done w/ T lamps for less cost? LED- exterior It is easy for LEDs to look good against HPS but maybe HPS wasn t the right choice all along. About 9 watts LED Parking Garage Lighting compared to HPS: Providence Portland Medical Center (PPMC) Parking garage lit with fluorescent Manufacturers product credibility.»are there credible testing methods used for the product you are considering?»lm-79- Approved Method: Electrical and Photometric Measurements of Solid-State Lighting Products»LM-- Approved Method: Measuring Lumen Depreciation of LED Light Sources.»Failure Rate- % by 1,»Warranty- Definition»Field service- Other components»upgradeability- Compatability»Control integration- Solid state compatibility Questions to ask? Customer says: I want to use LEDs! Unforeseen issues and premature failure»ask what their goal is.» Saving energy?» Saving money?» Better lighting?» Being Green» Using the Latest What is the embodied energy in this product?

5 LEDs out Plasma lighting Street & Area -1 This innovative solid-state 5 watt lamp has 1 LPW, 3,hr life, 95 CRI, rugged, dimmable, rapid on with fast restrike time, while being programmable and addressable.»lifi light sources use a solidstate device to generate RF (radio frequency) energy to power a plasma light source Go to link below to see video. Linear fluorescent exterior The Lighting Design Lab strives to help you, make the right decisions. Thank You MORPH FEATURES T5HO technology to get comparable light levels of traditional W Metal Halide One for one replacement with up to 5% energy savings Bi-level inboard/outboard switching saves energy and meets new energy codes Lighting Design Lab / Seattle City Light All Rights Reserved