All replies (7)
Hello @penta58. By law, the CRI/Ra value must always be 80, which is considered good. All our lights meet this requirement and have a CRI/Ra value of 80. We always specify the color temperature (Kelvin value). Can you tell us on which packaging you did not find this? Many thanks and best regards, Daniel
Guest
Hello,
Well, CRI/Ra 80 is a minimum value!
LEDs with Ra >70, >75, >80, >85, >90 and >95 are manufactured.
In the retail trade I find lamps with CRI/Ra >80, >85 and >90, but there are also some with CRI/Ra >70.
I can find the information on the packaging of the lamps, but not on the Internet.
However, the information for luminaires is also missing.
As you can no longer replace the light sources in modern luminaires, I think this information is important. Especially as an LED light is not really a disposable item, the LEDs should last almost forever ;-)
MfG
Dear penta58
Thank you for your input. I would be happy to clarify why we do not list theCRI/RA information for modern luminaires where the light sources cannot be changed. I will also enquire whether it is possible for us to show the CRI/RA data in detail for the light sources online on Migipedia.
If you would like to have details of a specific light source or luminaire by then, you are welcome to give us the article number.
Best regards
Silvia
Guest
Hello Silvia,
Well, modern technology doesn't always make life easier :-(
It was still easy with incandescent lamps, where the CRI/space is 100.
For technical reasons, the color temperature was about the same for all of them, Hallogen has a slightly higher color temperature and the old carbon fiber lamps have long been out of date.
Here, the color temperature also corresponds to the temperature of the filament. Temperatures of around 2,700°C really do prevail.
The problem with color rendering then came with fluorescent tubes; white LEDs work on the same principle.
Instead of the color temperature, warm white, white, cold white, etc. were specified in the trade.
The Ra value was only used in technology. However, there were so-called daylight lamps with a high Ra value and correspondingly more expensive. Standard fluorescent lamps have an Ra of 50-90, so they can be very different.
The CRI/Ra is coded in the number of the fluorescent lamps. The color 865 is 8xx for a CRI/Ra of 80-89. 765 has the same color temperature but a CRI/Ra of 70-79.
There used to be a test base in the store to test the bulbs.
I don't want to discuss the legal reasons for their disappearance, but now you're buying a pig in a poke!
With ESLs it is not always clear how long they take to really give light and with ESLs and LEDs you can't see what the light is really like. You then have the surprise at home. :-(
With the first generation of LEDs, the only indication was "white", which was usually very bluish and unpleasant.
This was followed by the specification of the Fab temperature, but with a CRI/Ra of <70, even 2,700K can have a strong blue cast :-(
With luminaires, it then depends on the intended use.
The CRI/Ra is irrelevant for reading. If you look at color images, it looks different. It then becomes critical with a sewing lamp, with a low CRI/Ra the thread seems to match in color and when you go outside the thread has a completely different color than the fabric!
Incidentally, even at Migros, for example, the lighting at the meat stand has a deliberately low CRI/Ra so that the meat looks redder :-)
P.S. I am a he.
Hello dear @penta58
I have forwarded your comments to the product managers. They were very grateful. I have learned that it is sometimes difficult to assess which information is helpful for users and which is more confusing.
However, we are currently investigating to what extent we can add to the information on Migipedia.
Best regards,
Silvia
Guest
Hello Silvia,
>I have learned that it is sometimes difficult to assess which information is helpful for users and which is more confusing.
>helpful and which are more confusing.
Well, there are two extremes:
1. you think everyone is stupid anyway and only give the price, because most people are already overwhelmed with watts and lumens ?
2. everyone is an Einstein and you give values that are not even known to all experts.
Many of my friends are against LEDs. The main reason is that they make bad purchases, which is an argument in favor of being able to look at the light source in the store. The same arguments also apply to ESLs, in addition to the fact that some products take minutes to reach their brightness.
The main complaint is the light color, mainly the blue color cast.
However, the color temperature without CRI/Ra does not really help here.
A completely different question is why not advertise with the CRI/Ra value?
You don't have to explain the whole measuring technique and meaning.
Even if it is not really correct, the CRI/Ra value can be seen as a percentage of the approximation to the light of an incandescent lamp.
MfG Peter(TOO)
Hello @penta58
Thank you for your feedback. The problem with trying out products in the store is that we simply don't have enough space available.
We have over 100 different light sources and so we can't display all the products so that you can try them out.
Unfortunately, we are very limited in terms of presentation. We therefore have a brochure in the store that can help customers make their choice.
We don't advertise the CRI/Ra value, as the values most sought after by customers are the watt and lumen figures. We therefore communicate this information more than the CRI/Ra value.
Best regards,
Silvia