I ordered a six pack of these back in Jan of 2019. Every last one burned out by the two-year mark. While they worked they looked very nice (which is the only reason this isn't a one star review), but the supposed benefit of LED longevity was way overhyped (and overpriced). My friend, who bought other bulbs from this same company has had similar problems, and when he tried to use the warranty this company gave him the run around, so I won't even bother. I'm going back to standard bulbs, at least then I'll get my moneys worth.

Edit:

Josh from Waveform got ahold of me and confirmed that there was in fact a defect in the batch of bulbs I purchased. He offered to replace the bulbs in accordance with the 3-year warranty with no hassles. I am beyond impressed with both him in particular and Waveform in general, for the way they handled what could have easily been a bad situation. I also contacted my friend and got his situation straightened out too -- both of us are now very happy and will undoubtedly continue as customers of Waveform going forward. It is comforting to see a company that stands behinds it's products and takes the warranty seriously.

I have always been looking for the best lighting for art working and these are it! I got the regular style bulbs and they do the trick.

I’m a painter, and use these lights for maximum color rendition in my studio. I believe the are worth the price.

I'm a painter, and have no affiliation with either company -- just interested in which bulb will work best for my painting studio and for photographing paintings and comparing scans with the originals.

Compared the Cree "Experience Exceptional" 60w equivalent 5000K bulb (TA19-08050MDFH25), with the Waveform Northlux 5000K bulb, for use in painting. My first impression was that the outer shell of the Waveform bulb seemed thinner, and had noticeable scratches and odd places on the surface. Nothing like that on the Cree bulbs. (Once I did get a Cree bulb with a slight scratch and Home Depot replaced it immediately.)

Then, although the labeled lumens on the two bulbs are close -- 800 lumens for the Waveform, 815 for the Cree -- the difference was immediately noticeable. At the same distance, my lux meter measured 722 lumens for the Waveform, 956 for the Cree.

I knew about other differences. The Cree bulbs are less expensive, dimmable, and carry a 10-year warranty (which I've used and has always been fulfilled). I was willing to overlook these differences, though, if I could see that the Waveform bulbs did show color more accurately, and if the 6500K bulb would be valuable for checking paintings, in case a collector or gallery displayed my paintings in that cool a daylight.

So, on to the color comparisons. This was made difficult by the difference in brightness. This seemed to make more difference, to my eyes, than the CRI of the bulbs. The stated CRI for the Waveform is of course 95, and for the Cree just 90+. When this particular series of Cree bulbs was introduced, I talked with a technical expert at Cree about the CRI. He said their tests show that it's quite a bit higher than 90, but they prefer to understate it.

Looked at my paint swatches under both lights at different distances. Keep in mind that I'm only using my eyes here, not a spectrometer or any other special tool. I did recently take the hue test, and came out with a perfect score, so my vision seems to be reasonably trustworthy. Having studied the Waveform technical information, I paid special attention to the reds -- also to see if blues and yellows looked warmer or cooler under the two lights. I just couldn't find a difference.

So the other question was, would it be worth at least buying the Waveform 6500K bulbs, since Cree doesn't make bulbs with a Kelvin rating that high. I don't enjoy 6500K lighting, but if it made a difference in color values or anything else that would make my paintings look wrong if hung in mainly north light, it would be worth using the bulbs to check that, just as I'd want to check a painting under 3000K halogen light (since many collectors and galleries use that).

The 6500K bulb seemed a lot bluer than the daylight -- at least by judging a whiteboard under it in lighting from different directions. And the paint swatches looked fine in that light, no matter how I arranged them. So I decided not to get even the 6500K bulbs. I'll keep them in mind if I do decide later that it matters.

I'm using these lamps to light my art studio. The colors & clarity are spot on!

I bought this bulb for photographing paintings for sale. I love how It really makes the colors pop! ! am very happy with my purchase.

Love the color balanced light of this product. Will order more for purposes other than painting studio.

Compare to other brands. These are the best ones. I think the 4005.65 is a little more green than the 4005.D65, it matchs natural daylight. The D65 is truly for artwork.

We replaced all the lighting in our art studio and our soft boxes. The light is amazing, our colors appear realistic and vibrant. So much easier on our eyes.

The ability to accurately see colors and shadows allows one to be more creative and detailed in their art