irene, i was reading in one book last nite that leaving nightlights on all night may cause problems to baby's eyesight. they sugguest to use a low wattage lamp that u can turn on if u need to go to baby's room to change nappies or etc but don't leave it on all night. we're using those wood/paper lights from thailand pasar malam cos it's quite dim, just enough to see things, but not bright enough to dazzle