My career has been in the printing industry as well as the photography/ graphic arts industry. I am retired now and do photo editing/restoration of photos. I know the importance of color matching.
The Waveform Lighting's D50 5000K A19 LED Bulb for Color Matching (ISO3664:2000) was a very economical way of having correct lighting for color matching.
Over the years I've used the Kodak color viewing light selector to verify lighting conditions and print shops and photo booths. When I got the lightbulb I tested it and here's the proof that it works great. Shown below are two samples one with Waveform bulb the other with regular home lighting.
I don't think there is a better economical way of having the correct lighting.

I'm using the D50 5000K bulbs for scanning art. First pieces processed seemed to require less PS color correction. Looking forward to more consistent files for printing.

Painting with watercolors at night was a challenge for me until I found waveform lighting light bulbs. The colors look very accurate and vivid. They've mentioned the CRI R9 in their website and I believe it is true. Red objects look more vibrant.

I bought the D50 5000K A19 LED Bulb(ISO3664:2000) bulbs for color management, too.
There are no replacementable bulb in Koea. So order it from here.
I'll buy it again.
Recommended!

I bought the D50 5000K A19 LED Bulb(ISO3664:2000) bulbs for color management.
One D50 bulb is used as an ambient light source to illuminate the Photoshop/Lightroom workroom, and the other is used to evaluate digital prints.

I also have some D50 lights made by other companies, but Waveform Lighting lights are much cheaper and also offer very good light quality.
In addition, it can be easily installed.
I highly recommend the D50 bulb for color management to individual photographers.

Needed a light for comparing and mixing colors. This bulb is bright and shows colors more accurately than the standard bulb.

Got them to put above my station at the tattoo shop. They are great and we are going to put them in the rest of the shop.

My wife is an Artist and she has desired a more natural light in her studio for those darker days of fall and winter. We have tried several other bulbs and then installed 2 of these next to others that have similar claims of natural light. This bulb shines!! it is easy to see the difference from other bulbs rated 5000K. It appears that the CRI of 95 is the differentiator. We will be ordering several more to completely outfit her studio with only these bulbs. The price is high in comparison BUT the quality is worth it. Now the only thing left is "will they last 25,000 hours?!!". We hope there is no need to ask you to honor the 3 year warranty coverage!!

Bought these and a previous set of the same for our bathrooms. Bright, crisp light makes it easier to wake up in the morning, especially on a dreary winter day. Makes the paint color pop, too!

Lovely white light and nice clean colors! Flicked on the lights after switching from cheap bulbs and my plants coloring popped. Could be placebo but I swear their colors seem much more crisp.