My dad and I do have one other point, though. Before shipping these bulbs to him, I got the chance to open one and check it out. One great thing about these LED bulbs that I haven’t seen with any others (our home is full of LEDs) is that they have a somewhat sticky exterior. Not so sticky that it’s problematic, but sticky enough that it’s much easier to keep it in your hands without dropping it. I’m not sure if the material serves any other purpose, but my dad and I both really liked that quality from a user perspective. http://www.nhanhieudocquyen.vn/fckeditor/showall.asp?pid=1http://www.nhanhieudocquyen.vn/fckeditor/showall.asp?pid=1