Methods and systems are provided which project germicidal light from a lamp toward an individual donned in outerwear to disinfect the outerwear. In specific embodiments, germicidal light is projected toward an individual situated greater than approximately 1 foot from the light source. Some systems include sensor/s for detecting presence of an individual within a target area a set distance from the disinfection apparatus comprising the light source and program instructions for commencing operation of the disinfection apparatus based on information from the sensor/s. In addition or alternatively, some systems include reflective panel/s exhibiting greater than approximately 85% reflectance. In such cases, the systems may include program instructions for determining operating parameters of the disinfection apparatus and/or positions of the reflective panel/s based on information regarding an individual who is in the presence of the disinfection apparatus or who is scheduled to be in the presence of the disinfection apparatus.