The Arabic phrase "تلحقني" can be translated to English as "it hit me". It conveys the idea of something suddenly or unexpectedly impacting or affecting the person. In the given context, the translation could be:

"Then the bulb fell, hitting me on the head."

Here, the phrase describes the bulb falling and the sudden impact it had on the speaker's head. It doesn't necessarily mean "crashing into my head," but rather emphasizes the suddenness and the effect of the bulb hitting the person's head.