The only potential difference between this and the shabbos lamp that I can see is if the shade portion is more attached here than in the shabbos lamp where it really is a separate piece. Here, while seems to detach easily, it seems to be somewhat attached and doesn't fall off with the bulb upside down (that is what it looks like to me) and if so may be considered a part of the bulb and therefore muktza. Some of the letters say that it is a separate piece but I can potentially hear someone disagreeing.