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Mathematical pagoda formula
There are x-rays on the top floor

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.