Very few actually know the science or you wouldnt struggle with quantifying heat on this board.
I have no more really to add, the science is there just you keep telling me they work and give no basis.
How much will a cooltube cool an already vented room? Lets talk about that convection properly please not just statements based on some assumption - i too have used both barebulb and cool shade and found that they adhere to scientific principle like ive explained.
Convection.... over to you