The lighting project of Hunan *** Normal University has three conference rooms that require professional lighting renovation. The area of the three conference rooms is almost the same, more than 200 square meters. The dimensions are respectively 21 meters long and 14.3 meters wide, 18 meters long and 14 meters wide, and 19.5 meters long and 14 meters wide. One of the conference rooms has a floor height. It is relatively high, about 7 meters, and the floor heights of the other two conference rooms are 3.5 meters and 2.85 meters respectively. The problem currently encountered by users is that the lights are dim, the pictures taken when the leader is speaking on stage are blurry, and the leader's face is relatively dim.