I am an electrical engineer and work on computers a lot. I was getting semi-constant migraines, sometimes ones that would even last into the weekend. Often a sensitivity to light would come with them. I unscrewed the fluorescent bulbs above my cube, added cubeshields, bought lamps, and bought these bulbs. The light coming from them is GREAT! My eye strain is almost completely gone. I recommended them to a friend, who is using them in his house. He says they are great as well.
Use the 4000K in my desk lamp...it's a very nice color temperature. May try the 3000K to compare, but so far this is the best lighting I've been able to find. The flicker-free feature makes this worth the cost!
I'm a die-hard halogen fan who is generally dismissive of LED technology. This bias is based on years of searching for, purchasing, then ultimately discarding various LED lights from various manufacturers. Even "high CRI" lights have proven unacceptable when compared side by side with a halogen PAR or A19, or with daylight.
I purchased these lights with skepticism, but decided to give them a try, based on the company's in-depth photometric reports and flicker-free operation (a MUST have characteristic). Waveform Lighting provides in-depth specifications and test results; far beyond any other manufacturer I have yet seen. Their website demonstrates that they are aware of what is required for quality lighting and of color science.
Upon actually trying them, I was pleasantly surprised. When compared side by side with a competitor's high CRI light of identical color temperature, the Centric clearly rendered colors more accurately and vividly, especially reds. No green cast, no sickly look from poor red rendering. Skin tones are flattering, and red and oranges look as they should. The difference is significant.
While LED technology currently still cannot totally match the spectrum of tungsten or daylight, these bulbs are the best I've found and are the first I've found that I consider truly usable, even for photography or videography. They also have the advantage of available higher color temperatures not possible with tungsten.
I would encourage Waveform to develop a flicker-free version of their T8 tubes. That would be the final say in fluorescent replacement as far as I'm concerned. I, like many people, develop migraines even with the higher flicker frequencies of electronic ballasts (when using LEDs). Flicker and the resulting health problems are larger issues for me than color rendering. Having a flicker-free high CRI (and R9 T8) tube would be spectacular.
I recently purchased a full Spectrum 10Watt / 4k 60Watt equivalent LED bulb and am pleased with the color rendition and
quality of bulb. I need to have accurate color readability in electronics design. Will get more.
I’m using the 6500K version as a backlight for a 72” TV. It’s a massive improvement over the common 6500K fluorescent (CRI 72) previously used. It makes the TV’s colors both more accurate and seem more intense. I wish I’d found it sooner.
I have only had the lights for a couple of weeks but so far i like them a lot. They are a bit bright (for 3 people shared office 36 sq. meters.) so had to get something to screen them of a bit. Shipping was very expensive though, almost as much as the lights themselves.
I received 10 LED white 6500K E26 bulbs and they were all great! So great that I decided to order more. And then even another one. Customer service was great to lump my next two orders together as well when I contacted them!
I use these to add extra soft fill in a room used for photography, they color matched perfectly with our other lighting. By far the most accurate bulbs I have ever found.
If you are not engaged in a job requires some acuity on your product, it is reasonable choice for lighting. But if so, you'd better buy an higher grade and higher color temperature. It's acceptable for my living room, and I will try led strips for other application in my house.