Light Source Characteristics Chart
Today outdoor lighting solutions should be decided by application requirements, and take all source technologies into consideration. Outdoor lighting applications can be satisfactorily served by several technologies, each presenting a unique combination of performance strengths.
What outdoor lighting system is ideal for your application?
The “ideal” solution should provide:
High Quality Lighting Results
- High CRI sources
- Wide distribution patterns
- Low exit luminance (glare) from luminaire (direct/reflected) or can cause problems for eyes and security cameras Instant on to operate on motion sensors, dim, or other control systems (adaptive lighting).
ENERGY AND VISUALLY EFFICIENT RESULTS
Uses least amount of energy for best “visual” results (not just light meter). Visual efficacy counts more.
From cradle to grave – usually means from manufacturing to disposal and energy use.
- Adaptive Lighting
- Motion Sense
Which system is ideal for your application?
Less “sustainable” and currently highest costled-lights, producing the most direct and reflected glare, and loses 30% light in its useful life. Entire luminaire may need to be replaced at 36,000 – 50,000 hours.
Provides long life but has most lumen depreciation. Induction-lights at 40,000 – 50,000 hours have 25-35% light loss. When source is changed, driver must be changed ($250-$350).
NEW METAL HALIDE
Metal-halide-lightscan provides good CRI and acceptable life but still produces 30% lumen depreciation by 10,000-15,000 hours of use.
TWIN T5 PROVIDES ALL OF THE ABOVE
Twin-T5-Lights Including 90% lumen maintenance for 90% life (now rated at 50,000 – 60,000 hours), with least expensive purchase, operating, and maintenance costs. It is controllable from simple switching to sophisticated dimming systems, including individual control addresses, and are instant on/off. Lamps are available that will start and operate from (-25) F to (+130) F. Light loss is only 10%-20% (not perceptible by human eye) at the extreme limits. As of 10/2012 twin T5 sources are slightly more sustainable than LED, with 100% mercury reclaimable and complete lamp 98% recyclable. It could be the most sustainable source for some time according to D.O.E. (see LD+A magazine November, 2012, page #16)