What does a 6% flicker rate mean?

I have a 4 lights rail fixture, currently running on 75W E27 BR reflectors. I'm looking for a flicker-free alternative. If I got it right, E26 bulbs should work, though not a perfect fit. As far as I understand, your only option is the 6% flicker bulb. What does 6% mean? that when it "flickers", it is only 6% less than full power? How is it in comparison to indecent flicker? 

While the measurements between the E26 and E27 are very similar, we find that the two standards are not always compatible. We have attached a link to a blog post on the topic below, in the hopes that it proves to be helpful for your purchase planning process. 

E26 vs E27 Bulbs - Interchangeable? Not Necessarily!

Generally speaking, a 6% flicker rate means that there will be a 6% relative difference in brightness between the maximum and minimum brightness output by the light source during a flicker cycle. The lower the relative difference, the less noticeable flicker usually is. 

Compared to our flicker-free LED lights (such as the CENTRIC HOME™ Flicker-Free A19 10W LED Bulb) which offer a 0% flicker rate, traditional incandescent light sources typically have a flicker rate of 15%. 

I know your article about e26/e27, but I still don't understand what might happen. On this page, you wrote that you "recommend exercising caution if used with E27 fixtures." Does it mean that if the bulb work during the day, and not 24/7, it should be fine? And when will you have E27 versions of these?

When E26 and E27 bulbs and fixtures are used interchangeably, the measurement differences in the base may cause arcing to occur at the gap between the electrical connection points. This arcing may cause hazardous electrical hazards to occur, which may damage the products and void the warranty. This is the primary reason why we recommend selecting a bulb that matches the socket used by the fixture. 

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