New LED enables small form-factor MR-16 replacements
Living in the US, it’s easy to see the world of LED lighting through Edison-bulb-illuminated glasses, but these bulbs are not necessarily the dominant light source, especially in Europe.
I heard at Strategies in Light this week that Europe has 1 billion MR-16 lights, which are small 35-50W halogen lights, about 2 inches long (or high) and costing about $12 each:
An MR-16 is an example of a small form-factor light, which doesn’t lend itself to a multiple-LED approach. For example, below is an older LED-based MR-16 with a slew of individual LEDs. There is no secondary optic because focusing all of those LED point sources is basically impossible. Fitting the LED, its power management circuitry, and heat sink into the MR-16 requires a single LED solution.
Targeting the huge market that exists for small form factor lights, Cree introduced this week its MT-G LED array that combines Cree’s EasyWhite color-mixing technology, a low thermal resistance of 1.5C/W, and an efficacy of up to 92 lm/W (560 lm at 6W), at 85ºC temperature, 3000k. (It’s good to see that LED manufacturers are starting to quote their numbers at real-world operating condition.) It fits into a 9.1mm x 9.1mm footprint.
Here’s how the MT-G compares in size to other Cree LED arrays:
With the MP-G you can now design an MR-16 light with a single LED, packing the LED, a secondary optic, the power management circuit, and heat sink all into the small MR-16 form factor. Cree has published a reference design including power control circuits based on parts from National, TI, and Diodes, Inc. Here’s how the circuits stack up in size:
For more on the reference design and its constraints, visit mtg.cree.com. (You can download the reference design here: It requires filling in a simple registration form.)
UPDATE: …And hot on the heels of Crre’s LED announcement is LEDzWord Technology’s introduction of its MR16-6.5W lamp:
“Just 2 days after Cree made its first official media announcement of a new lighting class LED designed for high-output small form factor directional lighting, Ledzworld launches the first lamp that integrates the latest Cree multi-die MT-G LED with its own superior thermal design and driver- technology.”