Innovation in Lighting


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Innovation in Lighting

  1. 1. Innovations in Light 0
  2. 2. No.1 LEDs Transforming the world of lighting in every sector – Why?  Energy efficiency up to twice that of fluorescent technologies  No lamps and 50,000 life leads to major maintenance savings.  Small size allows for slimmer, narrow & thinner luminaires.  They are free of the restrictive form factors of lamp technologies.  They work well in emergency mode, because they suit DC current.  Dimming LEDs should extend life and is generally better than with T5.  They have lower toxic content. Those are all the good things, but what are the negatives? 1
  3. 3. No.1 LEDs The negatives  A lot of LED products do not match the claims being made for them *  The initial cost is substantially higher than for a conventional product.  There is a problem of consistency of supply of components  There are often problems of colour performance and stability  The design process is more complex because of rapid evolution  There will be issues of future proofing and product continuity  Most of the life claims for these products are unproven Overall the positives far outweigh the negatives, and even if it is considered that they don’t , the tide has already turned towards LED ? 2
  4. 4. What type of LED to buy? 1. Quality controlled chip with a small flux & colour tolerance (bin). 2. Mounted on a well designed and constructed circuit board. 3. High consistency of colour (>3.5 SDCM) 4. High uniformity of appearance and performance. 5. Future colour stability in mind. 6. High quality/efficient surge protected driver 7. A DALI dimming option 8. Emergency lighting function with DALI central test capability 9. Independently tested photometric files for lighting software 10. Warranty offered is intelligible and credible 3
  5. 5. Who to buy an LED from? The same supplier that you would buy any other lighting from. The question of trust is always important and even more so with LEDs. You need a supplier that can fulfil that trust in: • • • • Design Product Service After sales 4
  6. 6. Example project comparison – new project T5 or LED? Kallista 4 x 14w Vs. Kallista LED on 2500 hours p.a. @ 10p/kWh Fitting Watts Lumens Initial Cost 4 x 14w 44 LED Est. 5y Cost 62 3700 134 £232 36 3500 203 £248 The 5 year total cost on a per fitting basis are similar, so other factors are driving the growth of LEDs 5
  7. 7. Example project comparison Kallista 4 x 14w Vs Kallista LED on 5000 hours p.a. @ 15p/kWh Fitting Watts Lumens Initial Cost 4 x 14w 44 LED Est. 5y Cost 62 3700 134 £407 36 3500 203 £338 The commercial analysis of LEDs depends on project circumstance and a view of the future. 6
  8. 8. Example project comparison – point for point replacement Existing switch start 4x18w Cat2 Vs Zen LED 0n 2500h . @ 10p/kWh Fitting Watts Lumens Initial Cost Est. 5y Cost 4x 18w 112# 2900 £18* £176 Zen LED 35 2876 £120 £164 Payback is under 5 years on standard time * Relamp/clean # CELMA Class C – 71% of ballasts installed in 2000 were at or above this consumption 7
  9. 9. Example project comparison – point for point replacement Existing switch start 4x18w Cat2 Vs. Zen LED 0n 5000h . @ 15p/kWh Fitting Watts Lumens Initial Cost Est. 2y Cost 4x 18w 112# 2900 £18* £186 Zen LED 35 2876 £120 £173 Payback is under 2 years on high use / higher cost application * Relamp/clean # CELMA Class C – 71% of ballasts installed in 2000 were at or above this consumption 8
  10. 10. The Technology of LEDs is complex 1. Q/C chips from major brands including known information on: • • • • Flux bins Colour bins Drive current Thermal characterisation 9
  11. 11. You must start with good quality LED boards 2. Quality modules with life data tested to LM-80 • • • • Minimum 6000 h test data for lumen depreciation Interpolation of data to L70/B50 50,000 of operating life Thermal information on (Tc) points 10
  12. 12. Ensure you have colour consistency 3. Colour consistency • • • • ANSI bins are not acceptable for consistency Fine binning (3 step MacAdam Ellipse) is necessary Bin should be close to Black Body Locus (BBL) A.K.A. Standard Deviation Colour Matching (SDCM) 11
  13. 13. Understand the issues of colour stability 4. Colour stability • • • • LED colour does shift with time/temperature US study shows substantial shift on some LEDs LM-80 6kh shift should be 0.007 uv or less Temperature should be within operating window 12
  14. 14. Apply a good optical design 5. Optical characteristics • • • • Uniformity across luminous surface Colour integrity in all directions Light distribution / glare level Surface appearance / texture 13
  15. 15. Use a good quality driver 6. Driver quality • • • • Drivers are most common point of failure Compatibility with board is important Case temperature (Tc) data needs to be known Interconnection quality is also important 14
  16. 16. Have a DALI option available 7. DALI control for dimming • • • • Interoperability Soft wiring Future compatibility Addressability 15
  17. 17. A DALI emergency central test option 8. DALI control for emergency lighting • • • • Interoperability Central automatic test Monitoring self diagnostic facility Addressability 16
  18. 18. Verified photometrics 9. Independently tested photometrics • • • • Validated technical information Dialux photometric engineering LM-80 life data on key components Confirmed efficiency of luminaire 17
  19. 19. A warranty worth the name 10. The product comes with an intelligible warranty • • • • Clear duration / usage Clarity of terms and conditions Not too much small print From a credible supplier 18
  20. 20. No.2 Organic (OLED) or Polymer LEDs (POLED) What are they?  Usually small glass elements emitting diffuse light Where are they?  Being used in decorative & low intensity (exit signs) applications Why not ambient lighting?  Too expensive, not efficient or bright enough and shorter life than LEDs. What is their future? Depends on who you talk to. The manufacturing is still difficult and it seems that they are a couple of years away from producing a competitive polymer product. 19
  21. 21. No. 3 - DALI controls Why DALI?  The widest range of drivers is available in DALI, many LED products cannot do DSI and 1-10v is now mainly found on strip/tape products. What else is driving DALI?  Emergency self – test is now a common requirement and DALI is that standard open protocol. Diagnostics, soft wiring and maintained illuminance are all more popular. Why not Wireless?  Actuators are expensive and so are most of the peripherals. Effective in small spaces with difficult wiring, but not usually cost effective in large projects. However Harvard have a new system (EyeNut) they claim will change all that. 20
  22. 22. No. 4 - LiFi What is it?  A method of data transfer using LED light fittings pulsing at high frequency. What are the advantages over WiFi?  Security, speed and segregation of information are three potential advantages, but it is too early to say for sure. Is it available?  Only in experimental form, but development has been swift over the past 2 years. We may see a number of early adopters start using it in 2014. 21
  23. 23. More information – Please Contact  Clearvision Lighting Ltd. 2, Elliott Park Eastern Road, Aldershot, Hampshire GU12 4TF Tel. +44 (0)1252 344011 Fax.+44 (0)1252 344066 22