l.e.d. myths
There is a lot of cheap rubbish out there when it comes to l.e.d. products, especially the kits of deck lights and so-called "l.e.d. spotlights". Vendors of these typically low power units have propagated “urban myths” about l.e.d. products for the sake of selling cheap boxed products to a gullible public. Myth one is that l.e.d's are always cool to the touch. Cool l.e.d. units are only cool because they are low power – once you get up to 1 watt and above, l.e.d.’s produce considerable heat in continuous operation and the design of housing has to be large enough and incorporate thermal conduction features to dissipate the heat away. The trendy demand for smart stainless steel housings doesn’t help this technical challenge as stainless steel is a poor dissipater of heat: brass and aluminium housings with ribbed exteriors do a better job of ensuring reliable long term performance.
Myth 2 is that “l.e.d. spotlights” can light large features. This myth, about the existence of “powerful” l.e.d. spotlights, was based on crude products using clusters of low power l.e.d.’s, which in reality have a very limited “throw”. While higher power l.e.d.s (with a price tag to match) have been making a mark in architectural lighting, it wasn’t until this year’s Chelsea Flower Show that a major UK show garden was so comprehensively lit using nothing but l.e.d lighting - the Australian Garden designed by Dean Herald and with lighting by ME Lighting of Sydney. They used over 50 l.e.d. lights, uplighting trees and plants, downlighting the outdoor kitchen and seating areas, lighting paths and steps, - even lighting the spectacular glass dining table waterfall feature from the inside – something you couldn’t contemplate doing with any form of lighting requiring lamp replacement. While the uplighting of the trees didn’t quite reach the punch of a 50w halogen spotlight, the 5 watt l.e.d. spotlights were probably close to being a 35w halogen equivalent and gave a pleasant ambience, especially with use of a clever filter lens to provide a warm white output to counter the reservations that l.e.d. lighting has a very cold appearance. Reliable warm white l.e.d.’s and a choice of beam angles are also becoming available in other suppliers’ products, particularly 1w underwater and recessed lights. These new products from ME Lighting and Megabay will be available soon from Lighting for Gardens