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by sherwoodlights

Osram turns to quantum dots for 90CRI lighting LEDs

“‘Osconiq E 2835 CRI90 (QD)’ pushes efficiency values to new heights, even at high colour rendering indices and warm light colours,” according to the company. “The LED meets the requirements of the Single Lighting Regulation [mandatory in Europe in September 2021] regarding the energy efficiency of light sources. Part of the new guidelines is a value >50CRI for R9 saturated red.”

Colour temperatures from 2,200 to 6,500K area available, with some reaching above 200 lm/W. That said for the 4,000K at the nominal 65mA, typical luminous flux is 34 lm and typical efficacy is 195 lm/W. The binning range of the 2,200K part is 24 to 33 lm, while 6,500K types span 30 to 40.5 lm.

Operation is over -40 to 105°C (Tj 125°C max) and at up to 200mA (Tj 25°C). The package is 2.8 x 3.5 x 0.5mm.

E2835 is also available in two other versions: 80CRI for office and retail lighting solutions and E2835 Cyan “which produces a spectral peak in the blue wavelength range that supresses melantonin production in the human body”, said Osram.

Quantum dots are semiconductor particles that emit light in different wavelengths depending on their size – a form of phosphor that is in its infancy compared with traditional types.

These can be tuned to convert blue light in to other colours – with narrower emission peaks that traditional phosphors – allowing close control of final emission characteristics.

“With our specially developed Quantum Dot phosphors, we are the only manufacturer in the market that can offer this technology for general lighting applications,” said Osram product director Peter Naegelein. “The Osconiq E 2835 is also the only
available LED of its kind in the established 2835 package and impresses with extremely homogeneous illumination.”

The Osram quantum dots are encapsulated in a sub-package to protect them from moisture and other external influences. “This special encapsulation makes it possible to use the small particles in demanding on-chip operation within an LED,” said the company.

by sherwoodlights

LED Lights making Dent in UK energy demand!

Installing a single low-energy LED bulb may make a trivial contribution to cutting the carbon emissions that are overheating the planet.

But if millions choose LEDs, then with a twist of the collective wrist, their efforts will make a small but significant dent in the UK’s energy demand.

Studies show making products more efficient has – along with other factors – already been slightly more effective than renewable energy in cutting CO2 emissions.

The difference is that glamorous renewables grab the headlines.

The “Cinderella” field of energy efficiency, however, is often ignored or derided.

Who says this?

The new analysis of government figures comes from the environmental analysis website Carbon Brief.

Its author says EU product standards on light bulbs, fridges, vacuum cleaners and other appliances have played a substantial part in reducing energy demand.

Provisional calculations show that electricity generation in the UK peaked around 2005. But generation per person is now back down to the level of 1984 (around 5 megawatt hours per capita).

How much carbon has been reduced?

It’s widely known that the great switch from coal power to renewables has helped the UK meet ambitions to cut carbon emissions.

The report says the use of renewables reduced fossil fuel energy by the equivalent of 95 terawatt hours (TWh) between 2005 and now. And last year renewables supplied a record 33% share of UK electricity generation.

But in the meantime, humble energy efficiency has contributed to cutting energy demand by 103 TWh. In other words, in the carbon-cutting contest, efficiency has won – so far. And what’s more, efficiency is uncontroversial, unlike wind and solar.

What role has industry played?

The energy efficiency story doesn’t just apply to households. There have been major strides amongst firms, too. Big supermarkets have worked hard to improve the performance of their lighting and refrigeration.

And because firms and individuals are using less energy, that has offset the rise in energy prices. So whilst the prices have gone up, often bills have gone down.

The issue is complicated, though. Other factors have to be taken into account, such as energy imported via cables from mainland Europe, population growth and shifts from old energy-intensive industries.

Should ‘Cinderella’ efficiency be allowed to shine?

Simon Evans from Carbon Brief told BBC News: “Although the picture is complex it’s clear that energy efficiency has played a huge role in help the UK to decarbonise – and I don’t think it’s got the recognition it should have.

“Say you change from a B or C-rated fridge to an A++ rated fridge. That can halve your energy use from the appliance, so it’s pretty significant.”

The UK government has consistently said it champions energy efficiency, but campaigners say it could do more. The UN’s climate body also supports energy efficiency as a major policy objective, although the issue features little in media coverage.

But supporters of efficiency argue that ratcheting up efficiency standards for everything from planes and cars to computer displays and freezers offers the best-value carbon reductions without the pain of confronting the public with restrictions on their lifestyle choices.

Joanne Wade from the Association for Conservation of Energy told BBC News: “I haven’t seen these figures before but I’m not surprised.

“The huge improvement in energy efficiency tends to be completely ignored. People haven’t noticed it because if efficiency improves, they are still able to have the energy services that they want. I suppose I should reluctantly agree that the fact that no-one notices it is part of its appeal.”

Scientists will be keen to point out that government-imposed energy efficiency is just one of a host of cures needed to tackle the multi-faceted problem of an overheating planet.

by sherwoodlights

Halogen lightbulb sales to be banned in UK under climate change plans

Sales of halogen lightbulbs are to be banned in the UK from September, with fluorescent lights to follow, under government climate change plans.

The move will cut 1.26 million tonnes of carbon emissions a year and deliver consumers savings, officials say.

The UK began phasing out the sale of higher-energy halogen lightbulbs in 2018 under EU-wide rules.

Now retailers will no longer be able to sell most remaining halogen bulbs, such as kitchen spotlights.

Legislation for the plans is being brought forward this month by the government.

The plan will help continue the shift to low-energy LED lightbulbs, which account for about two-thirds of lights now sold in Britain.

It is expected to mean LEDs will account for 85% of all bulbs sold by 2030, officials said.

LED lights last five times longer than traditional halogen bulbs and produce the same amount of light, but use up to 80% less power.

by sherwoodlights

A Light Introduction: Sherwood Lighting

Hello there Light readers, we shall be using this blog to keep you all up to date with the latest news in the light industry alongside the most popular products and techniques used in the industry.

First I thought I would introduce us to my own company, Sherwood Lighting. Sherwood Lighting has over 30 years’ experience in supplying and fitting high-quality lighting to customers around the UK. Boasting one of the most quality suppliers of lighting in Nottingham we are proud to say that much of our business is from regular, repeat customers who appreciate the expert advice and guidance our friendly and helpful team can provide. From our centrally located UK base, we are also able to offer the same exceptional service levels to customers across the country ordering from our website.

For previews of our lighting displays please keep an eye on our instagram page (located at the bottom of the page) for more information on our activity as well as our facebook and twitter pages at Sherwood Lighting. Stay with us as we go forward and we shall help you through placing your light around the house or outside, wherever you wish! We are here for you.