I don't know much about the ott lights as I don't have one, but after I read on here about lowes having some bulbs I went to look. They call theirs Daylight bulbs and I have to say that they are super bright. I now have one in my living room light and sewing room and bath and am thinking about replacing the rest because it makes the house look so much brighter and the rooms that I have the normal energy saver lights now have a yellow look to them. I think I will stick with that for now as it was WAY cheaper.