D50 Lighting™ 5000K A19 LED Bulb for Color Matching (ISO3664:2000)

I bought this bulb to illuminate prints as they come off of my Epson P900 inkjet printer, and for that purpose it works quite well. I measured a CCT of 5045K and CRIa of 97.0 (R9 93) with a Sekonic C-800-U spectrometer, so in spec there. However, the SSI was only 77 [CIE D50], a bit disappointing. I have attached a measured spectrum. I think the SSI value suffers from a drop-off in the greens and the significant blue spike that is characteristic of this type of LED bulb. I don't think I would use this bulb for photographic purposes.

I've been using these bulbs for several years, it's working great.

I bought a BenQ for color management, so I needed D50 lighting to compare prints. I bought a 6-pack of D50 800-lumen bulbs for my editing room lighting. Then, I was asked to take pictures at our town's Doughnuts with Santa event. So I bought a couple of softboxes that take four bulbs and used the Waveform bulbs. Worked great! It could have been a bit brighter, but I used ISO 640 and got great shots. My next purchase will be a 6-pack of 1600-lumen bulbs for the softboxes.

I looked at a lot of options. Most say nothing about spectral accuracy (let alone CRI). I spent a lot of money on my BenQ and my Epson P900 - why skimp on lighting? I am convinced these are the bulbs that are the lights for photographers who care about color management.

We appreciate the fast shipping of this product. The product is reliable and will continue to repurchase for future use.

When I compare The D50 (95 CRI, 60w, 800 Lumens, 5000k) bulb against the Philips Ultra Definition (CRI 95, 60w, 800 lumens, 5000k) bulb, both showing in a two-bulb light fixture, the difference is stark. On paper, they should be the same brightness in lumens, the same CRI value, and the same temperature, but in reality, the D50 is very noticeably brighter and shows better color on the art hanging beneath the light fixture. I had doubts about the higher expense, but I want to assure you it is worth it. The D50 is a far superior product and well worth the expense. When I made the comparison, I was shocked at how much better the D50 was. The bulb is not dimmable because it would adversely affect the color-matching feature of the bulb.