In Chinese culture, the Lantern Festival, also known as the Yuanxiao Festival or the Spring Lantern Festival, is celebrated on the 15th day of the first lunar month, which usually falls in February or March．Traditionally, people light and display colorful lanterns, eat sweet glutinous rice dumplings called yuanxiao, and enjoy various performances and activities.

As for the question of whether all the lights in a household should be turned on during the Lantern Festival, there is no strict rule or requirement．Some families may choose to turn on all the lights to create a festive and joyful atmosphere, while others may only light up the lanterns or decorate certain areas of the house.

Ultimately, the celebration of the Lantern Festival is about bringing light, warmth, and happiness to the family and community．Therefore, the way of celebrating may vary depending on personal preference and tradition.