LED news and insight from our technology editor Steve Bush, who has been messing with LED lighting for more years than he would care to remember.
You might have missed it: Ledil Rita
Polymer Optics managed it with its hybrid lens/reflector, mentioned here, and last year Ledil pulled a rabbit out of the hat with its Rita reflectors.
When describing the Rita series, wonky white funnel seems to sum it up.
Rita-A came first (left) – intended for task and application lighting.
Its funnel effectively forms a beam, and pushes it over sideways – the peak is 30° off-axis.
If on-axis straight ahead is 0°, most of the beam is between 5° and 55°.
So you can mount the light on the wall (right) and have it illuminate a table top without lighting the wall up, or mount it on the ceiling to light up a painting (see diagram) without lighting the ceiling.
It rotates to move light around, direct the light, and “Rita-A can be mounted side-by-side [on the ceiling] to illuminate long walls with minimal hot-spots or shadowing,” said Ledil. “Outdoor applications include residential lamps used in urban areas or for lighting stairwells in parking garages.”
Efficiency is 86%, despite having no metallisation (oddly, the data sheet says: “Reflector is made of aluminium coated…”).
It is pretty small – 17.1mm tall (17.3mm with mounting tape) on a 22mm base, occupying 28.4x36mm.
The firm has qualified it for Cree XT-E, and Rebel and Luxeon M from Lumileds.
Tech specs include: use up to 115°C, UL 94 V-2 flammability rating, and moulded alignment pins.
Height is again 17.3 mm and it needs a 31,9×28,4mm footprint .
Stated efficiency is 85%.Tags: metallisation, parking garages, reflectors, stairwells, wonky