The present invention provides a novel lighting accessory, which has never been proposed before for increasing luminance when in one embodiment, a mobile electronic device is used in a low light environment for photography, videography or video conferencing. By disposing a lighting device in an accessory, when a user utilizes a common back camera on a mobile device to conduct video conferencing, the lighting device helps to illuminate the user's face and increase luminance. As for the user using a common front camera to do video or photo shooting, the lighting device helps to increase luminance of the subject and ambient environment, so that the video or photo shot performs at a high quality. The lighting device can be concealed in a novel reversible light housing that can also be used to conceal other wearable technology, such as fitness monitors, watch components, etc.