A "must" for every night owl

Looking for a way on the plane, at night in bed or in a darkened room on my e-book not to miss out, I found the "night owl" ...............! I'm excited because it exceeds all expectations! It is light, the whole e-book / book illuminates and makes my head to move a bit without the cone of light leaving the e-book / book the space! I just read 500 pages without realizing a reduction in the luminous efficiency, ergo seems the juice consumption did not really shake the battery! The owl keeps well on the glasses and not slip! Can I recommend everyone!