The number of red lights has doubled, so each floor of the tower is x, 2x, 4x, 8x, 16x, 32x, 64x from top to bottom.

So x+2x+4x+8x+16x+32x+64x = 381.

x( 1+2+4+8+ 16+32+64)= 38 1

x=3

So there's Three Lamps District on the top floor.

The shape of this tower is big at the bottom and small at the top. On the other hand, it doesn't look like a tower, so there are more lights at the bottom.