We have a Gen3 LED driver used with our recessed downlight range which will provide flicker free performance. However, it doesn’t account for the 3 frequencies that energy suppliers are pushing through the grid on a daily basis which may cause intermittent flickering. It is extremely difficult to protect LED’s from all 3 frequencies because there are so many variables involved.
You may find that one set of downlights will not be affected by the ripple frequency, while another brand is affected in another room. This isn't necessarily because one is 'good' and one is 'bad', although higher quality LED drivers will generally perform better. It can simply mean that the operating frequencies of each product are interacting differently with the ripple frequency. Depending on many factors such as the quality and length of cabling, loads on each circuit, the operating specs of the LED light and driver, or even which dimmer is installed (if any), you may find the effects of the ripple tone will change.
One of key amplifiers of this issue can be the dimmer installed; this has led to some dimmers offering ripple tone protection, which can work in some situations. However, due to the variables previously outlined, you may find the same dimmer will not solve these issues 100% of the time.
In our experience we’ve found a combination of high quality dimmers from manufacturers such has Cabac or Diginet, in conjunction with a high quality LED driver, will result in the best performance against ripple control. If you're still experiencing the flickering effects of the ripple tone, then the last step may be to contact your local power supplier to see if they can adjust the frequency of tone being delivered.