Nights are brighter than they used to be, due to human use of artificial light at night (ALAN).  This increase in ALAN is often called light pollution, since brighter nighttime skies disrupt biological cycles and behavior.  Few light pollution studies assess impacts to larval invertebrates, a taxonomically diverse group, some of which use light to regulate depth. We integrate observations of behavior in the lab with depth-stratified field collections to evaluate the effects of light pollution to the depth and thereby dispersal of coastal larvae.