I'm using this light on my Schwinn 430 elliptical (also purchased through Amazon) clipped to the magazine holder.  It puts out enough light for most any type of reading material, including the nook ereader.  Also, since the elliptical's display isn't back lit it helps me see the display readouts (when I'm not reading) in low light.  I especially like that I can use rechargable triple A's in it.  The one battery lasts a long time.