The short answer would be with confidence and pride.
Independent research* shows that landscape architects, architects, and civil servants, all want to use LEDs for outdoor lighting purposes, however they lack information about how to sell the idea of this technology.
As more solid information pours in everyday about the virtues of LED technology for outdoor applications, we're noticing a considerable rise in the quantity of projects that are being exclusively illuminated by LEDs. There are no down sides to using LED technology for outdoor lighting purposes, and more advantages than ever dreamt possible. In order to get this incredibly environmentally friendly technology out there (literally), we've decided to help by giving project managers and designers the tools they need to convince their clients that LED is the way to go.
1. Properly researched, a few clicks on the Web will do, LED lighting technology comes out on top for efficiency, quality, durability, and lumen output per watt.
2. LED technology uses 30% to 50% less electricity than any other light source, while at the same time delivering the same lighting quality as non-LED sources.
3. LED technology lasts 3 to 7 times longer than any other light source currently available on the market.
4. HID light sources will become obsolete in the near future, suffering the same fate as leaded fuel; with out current energy situation, it's inevitable.
5. LED technology is fully mature. All the tests prove it. There's no more debate on this subject. However, just like with any other product, research (or comparative shopping) is strongly suggested as not all companies create LED products of the same caliber.
6. Outdoor LED luminaires are no longer subject to design limitations, there exists technology out there that allows you to take an LED optical block and stick it into a luminaire designed for a HID light source.
7. High quality LED light sources no longer suffer from smaller pole spacing syndrome. In fact, it is now possible to simply swap optical blocks in pre-existing infrastructures as long as they were designed to take an LED light engine without having to recalculate photometric performance.
8. The cost of LED technology is no longer significantly more expensive than HID technology. Calculating the return on investment (factoring the longer lifespan, energy savings, fleet deployment for maintenance purposes, etc.), LEDs outshine any other light source in the world by a wide margin.
9. LED technology brings extra value to any city. It increases visibility in the media (since it's so environmentally friendly), and attracts residents (since being environmentally conscious is a positive aspect for any city), and it lowers citywide energy consumption that in turn lowers taxes and increases property values.
10. The colour of LED light is no longer what it used to be in the past (lunar white), in fact in 2008 the white light that LEDs generate can be made as soft (like incandescent bulbs that generate a yellowish while light) or as sharp (stark blue like neon light) as you want for your project.
11. Do your research, read white papers (LEDs for outdoor lighting applications), don't get influenced by barriers to entry (see http://en.wikipedia.org/wiki/Barriers_to_entry), and you'll have all the knowledge you need to explain the merits of LEDs with confidence and pride.
Considering the energy crisis our world faces, considering the ever increasing cost of fuel, considering the state of our environment; championing the cause of LEDs for outdoor lighting applications should feel like giving water to a man dying of thirst in the desert.
*Research conducted by Exo Marketing, 2008.