Hello everybody,
I am reaching out to you here in hope of getting some additional input about an issue with flickering lights that I have been having for almost 2 years. I try to keep it concise where possible:
In May 2022 I decided to undergo a major renovation of my 2BR 75sqm apartment including rewiring of all lights and the installation of a new, dimmable lighting system from BTICINO and their ‘Living Now’ series (wireless connection of the switches/dimmers to the central gateway).
All built-in lighting fixtures (ceiling lights and LED strips for ambient light) are connected to the ‘lighting’ breaker. I have one table lamp in my living room that connects directly to the power outlet that in turn is connected to the ‘receptacle’ breaker. I am using compatible dimmable GU10 LEDs in the ceilings and a E27 LED lamp in the table lamp. I have ambient LED strips underneath the floating TV cabinet, in the bed headboard and behind the mirrors in the bathrooms. The LED strips are hooked up to a separate LED driver to lower the voltage.
Shortly after the installation was completed, the flickering started. The flickering is erratic and follows no pattern. Sometimes it’s every day in the morning, or evening, or both… sometimes it’s not happening for 2-3 weeks at all. I ALWAYS have the same load on the circuits, meaning I use the same lighting scene in the mornings after waking up. Sometimes it flickers right after switching on the lights, sometimes it only starts after one hour. Sometimes it flickers continuously for hours, sometimes it stops after 30 seconds, then no flickering, then it starts again. There is zero predictability. It also does not matter what brightness level the lamps are set to… there’s noticeable flickering at 10, 20, 50 and 70%. There’s even a tiny little bit of flickering noticeable at 100%.
Only the ceiling & table lamp flicker. If it flickers, ALL these lights flicker. It’s never only one room. It’s always ALL rooms. EXCEPT for the LED strips which use a designated driver
Also, when it flickers, I kill all breakers except the lighting breaker and the flickering continues on the table lamp. Also, if I kill all breakers, including lighting breaker, but leave the ‘receptacle’ breaker on, the table lamp still flickers. Strange! Table lamp is connected to the power outlet and has never been rewired.
At that time, my apartment technicians as well as the lighting company believed that this flickering was caused by interferences or faulty/bad wiring.
Eventually I decided to rewire everything (to eliminate the potential root cause of wireless interferences which, in hindsight, was a mistake as the table lamp was not rewired in the first place anyway) and to install a state-of-the-art Lutron Homeworks QSX lighting system. The Lutron dealer I worked with is very experienced and does both large-scale commercial and residential projects - the support I've been receiving is exceptional!
Guess what? The flickering continues to this day.
We tried all kinds of GU10 and MR16 dimmable lamps available, we also connected a non-dimmable common E27 lamp directly to the lighting breaker which does NOT flicker despite all other lights flickering. We wanted to prove that the circuit breaker board is working and the incoming voltage is within normal range.
When it flickers, the voltage fluctuates between 225 and 232 quite quickly up and down. I can see on the installed voltmeter that there is definitely instability existing at times. Even when the light works fine, I never have a constant 230V. I usually have 227 or 228V.
We had the technicians, lighting specialists, even the service provider who looks after the entire building power in my unit, they measures everything and nothing points to a faulty cable or situation that may affect the entire building.
I firmly believe this is a temporary power surge/drop by our energy provider who, of course, is unwilling to investigate.
We recently installed a power surge protector but this did not bring any change. We are now considering to install a power stabilizer.
We also installed COB (chip-on-board) LEDs with a designated driver but these also flicker!
For the last 2 years we have this major construction site right next to my condominium, it’s a 28 story building. We spoke to their Head of Technician if their machines could cause the flickering, however, they are running on a different meter and the flickering occurs at times very early or late in the day when there is no activity at the construction site at all.
I wonder what else I could do or try to identify or even mitigate this problem?
I have attached a picture of my kitchen cabinet that contains the circuit breaker box and the Lutron Homeworks core components. Also I have attached an excel file that shows when I switched on the lights, when the flicker started or stopped, and when I switched off the lights - just to give you a rough idea when the flickering occurs. Also a video that shows the flickering and the voltage fluctuations.
Flickering Video
Thanks in advance for all the input.
Light Flickering Tracking Sheet.pdf