Why do Philips lighting spotlights turn on and off for a while?

Hello, first of all, please ask the electrician to confirm whether the circuit is in poor contact (this must be confirmed by the electrician, and don't write privately if you don't know the circuit). If it is a circuit problem, then the electrician can solve it. If the electrician checks the circuit, it's not the circuit, it's the lamp itself. Confirm whether the lamp purchase time has passed the warranty period? If it is within the warranty period, please find the original supplier of lamps with the proof of purchase, and let them be responsible for maintenance or replacement. Philips lamps have a warranty. You don't have to spend money during the warranty period, but you will spend money after it.