LED Luminaries

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.

Multi-die LED is brighter than halogen MR16

Cree’s multi-die MT-G LED is at the centre of this reference design which replaces 35-50W halogen MR16 bulbs, writes Steve Bush.

Available free from Cree’s website, it includes contributions from Diodes, National Semiconductor and Texas Instruments (alternative electronics); Neng Tyi Precision Industries (heatsink); Carclo and Ledil (optics).

Demonstrated at EuroLED next to a 20W MR16, Electronics Weekly can confirm that a 7.5W variant is far brighter, has an even beam, and is just as white.

The 9x9mm MT-G is binned and tested at a realistic 85°C.

Minimum colour rendering index (CRI) is 80 for the 3,000K (warm) white variants where to top bin delivers up 1525 lm at 4A

The brightest, coolest (4,000K) bin delivers up to 560 lm at 1.1A.

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