The lit up lanterns signify the guiding for the ancestor's souls, which are believed to return home during the Obon period.
EXIF info:
Nikon D90
Lens: VR 18-55mm F/3.5-5.6G
Focal Length: 55mm
Aperture: F/5.6
Shutter Speed: 1/80s
ISO Sensitivity: ISO 400