Tech news tagged ‘colour temperature’

Single chip for LED bulbs that dim to lower CCT

Dialog Semi has introduced a single chip dual output power converter that can give incandescent-like LED dimming – where colour temperature (CCT) falls with intensity.

Called iW3640, it is a 25W 2-channel mains-powered LED driver that needs no external microcontroller, and is intended for 75-150W-equivalent A19…

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Osram goes all theatrical with tuneable colour temperature

Osram Opto has added a variable colour temperature lighting LED to its Ostar Stage series.

Intended for use in spotlights, it has foure die: two 2,700K warm white and two 10,000K very cold white.

The dies are paired in opposite corners of a square array for best mixing…

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Cree reveals 170 lm/W light bulb

Cree is claiming 170 lm/W with good colour rendering from a lab prototype LED light bulb, writes Steve Bush. “LED lighting at this level of performance is only made possible by advancements across all elements of the LED lighting system: lighting-class LEDs, optics, drivers and thermal management,” said…

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LED reddens as it dims for soft lighting

LED Engin is to reveal details of an LED that dims like a halogen bulb, reddening as its output drops, at Light+Building in Frankfurt (15 – 20 April), writes Steve Bush. Dubbed Luxitune, its dimming characteristic is intended to match established expectations in architectural lighting. “This is particularly useful in…

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LED bulb from Cree emits a 2,700K colour temperature

Cree has demonstrated an LED lamp to replace 60W light bulbs. The prototype is dimmable and emits an incandescent-like 2,700K colour temperature with a colour rendering index (CRI) “of at least 90″, claimed the firm. It delivers over 800 lm for under 10W consumption…

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Top 10 LEDs for lighting – Cree LRP-38

Check out our Editor’s choice of 10 LED products that stand out for their specifications and efficiencies in this most active of design areas.Cree LRP-38 is an LED with a colour rendering index (CRI) of 92, putting is among incandescents for colour quality.”It generates a CRI…

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Osram claims first LED-based replacement for 40W bulb

We report today that Osram is producing what it claims is the first LED-based replacement for a 40W bulb. Dubbed Parathom Classic, the bulb consumes 8W and produces 345 lm at a colour temperature of 3,000K. Lifetime is claimed to be 25.000h. “This is the very first…

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