Bellaboo has a point about your power source. If you don't have the light and your sewing machine(!) on a surge protector, that might be a good first move. Many places have some fluctuation in power, especially during air conditioning season. Also, some homes built during the Vietnam war period have aluminum wiring, which is notorious for causing problems.
I have swing arm lamps of the type that clamp on, but my main sewing table did not have an edge that anything could clamp onto. I drilled a half-inch hole that just fits the post of the lamp that would usually go into the clamp. It works well for me, but I have to say those LED strips that fasten in the throat area of the machine certainly look effective. I may have to try one. LED are cool and energy wise, and the bulbs last a long time.