That's true, and the OP should be strongly advised to not install
... a 40 watt light bulb.
Jackrae I thought that the point you were making was that cables running past the lamp wouldn't be damaged by the heat as it should only be a 25W, not that a 40W lamp should not be used. Apologies if I got that wrong.And you will also observe that the unit has a label which states the maximum wattage bulb is 25watt.