Sleeping with a nightlight can also disrupt sleep if a bright, white, or blue type of lighting is used. If using a nightlight, it is best to stick with a warmer light color, such as red or amber, to prevent sleep disturbance. Sleeping with a nightlight can also disrupt sleep if a bright, white, or blue type of lighting is used. If using a nightlight, it is best to stick with a warmer light color, such as red or amber, to prevent sleep disturbance.