I have had it for 7 whole years, permanently plugged in, I never turn it off all these years and it hasn't had the slightest issue...

If possible! I bought it when I was in high school, finished university, and it still works. We use it daily, it has also taken some falls because the area is a bit narrow, but still going strong. In terms of brightness, it is a bit weaker than a 7W bulb, but we still use it with paper covering it.