I've used "daylight spectrum" lamps for several years & have 3 floor lamps. I find when I'm getting tired, switching them on helps tremendously. I've even got one that clamps on & has a magnifier built in & use it often for fine, close work. I got all of mine online, from www.firststreet.com (formerly Techno Scout), as Ott lights were so expensive. In my sewing room (overhead light w/ fan) & in regular lamps where I read or sew, I use "Reveal" bulbs (slightly blue looking), to keep colors true. When you buy your lamp, be sure to buy an extra bulb; even tho they last a long time, they may be hard to find when you need to replace it.