220V-240V TRIAC dimmable driver for 9W LED downlights
In stock at 327 pcs
SKU#: 220V-driver
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220V-240V TRIAC dimmable transformer 9W for LED spotlights
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€ 20.00
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220V-240V TRIAC dimmable transformer 9W for LED spotlights
- Delivery status In Stock
- Brand Ledstore
- Breadcrumbs Home Led Lights 220V-240V TRIAC dimmable driver for 9W LED downlights
- Category Led Lights
- SKU 220V-driver
- 9
- 24V, 230V, Dimmable, Wireless VaLO dimming, Wireless Zigbee dimming, Wireless dimming, Wired
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Customer questions
- How long is the connecting wire between the 12V or 24V transformer and the luminaire?
- Where to place the transformer?
- How to calculate the transformer size? What does 100W mean in practice?
- Can I install several different led strips on the same transformer?
- Are your led spots adjustable/dimmable?
- Are the bulbs in LED spotlights replaceable?
- What brand are your LED spots?
- What if I buy an LED spot now and it breaks in 8 years, what will replace it?
- Do led spots require a service hatch?
- How much depth do led spots require?
- Are spots chainable?
- Led spots can be selected with 12-24V or 230V transformer, what?
- What is the difference between a 12V and a 24V transformer?
- What happens if I put a 12V led strip into a 24V transformer or vice versa?
- How long can I put a 12 or 24V transformer before the lamp?
- What is a TRIAC dimmable transformer?
- What can be used to dim TRIAC dimmable transformers?
- What is an ampere? Watt? Power?
- What is the difference between 200-1500mA (milliampere) and 12/24V DC (direct current) transformers?
WHAT IS CRI, THE COLOUR RENDERING INDEX
High quality LED lights also have a high colour rendering index, or CRI. A good colour rendering index (CRI) for home use is above 90, and nowadays many market lights are unfortunately closer to 80.
CRI tells you how well an LED light displays colours as they should be. For designers and architects, as well as interior designers, it should be one of the most important considerations. Make sure the lighting is perfect so that your artwork is what it is meant to be.
Colour rendering index
The colour rendering index is expressed as a number on a scale from zero to 100, where 0 = no colour rendering and 100 = full colour rendering. The colour rendering index of LED lights is also known as Ra, which is measured on a smaller scale than CRI. This Ra value does not include red tones or skin tones, for example, so it is a 'glossed' figure for the true quality of an LED light.
RA value
The Ra value measures the reproduction of colours using eight different reference colours. CRI takes into account the wider (15) wavelength range, including reds and other warm colours.
The Ra value is calculated by cutting the wavelength range, weighting the blue and violet tones, and calculating the weighted average of R numbers 1-8.
Excluded from the Ra value are, for example, the colour rendering of bright reds, yellows and greens, and shades close to skin tone. These are described by R-values between 9 and 15. The following is a picture of a measurement result that easily confuses the consumer.
This measurement is from a 9W CCT Led spot
Read more on this topic:
Colour rendering of LEDs - What is the difference between CRI and Ra-value?