The ones I have are 60W halogen in a BC holder with a regular sized screw on glass globe. If anything the outer globe is very slightly cooler than a regular 60W tungsten bulb - but there's not much in it.
After all - 60W is 60W - a mixture of a little bit of light and lots of heat.
I'm not sure that the BC holders are rated to cope with a 150W halogen - as for scorching the shade - that will depend on how long it's left on and how close the lamp is to the shade.
Peccavi
December 2010