I tried this with my office lamps and saw the flickering so I bought the Philips bulbs you linked to. They just arrived and I filmed them but they also show the

I tried this with my office lamps and saw the flickering so I bought the Philips bulbs you linked to. They just arrived and I filmed them but they also show the flickering when filmed on an iPhone in slow-mo mode. Do I need to buy a specific model of Philips bulbs? Or is my Ikea lamp the culprit now? I paid a ton of money for a certified flicker free monitor so I'm very keen on making sure the lamps are flicker free as well.