Sylvania's 3 way is really not very good. Glob is worthless and I got 4. They are yellow (er than other compact fluorescents) and there are in fact a 2.5 way. There is very little difference between the middle and the high, which is about equil to a 75 watt light bulb. The Sylvania hits 100 watts of brightness and isn't as yellow. Glob is cheeper and not worth it.