My reading nook got 10 degrees colder after I swapped the bulb, so check your wattage
That 60 watt incandescent I had been using for 2 years was quietly baking my corner by the window in the spare room, and the day I switched to a 9 watt LED the whole spot felt like a dentist's office, so does anyone have a warm bulb that actually throws heat or am I stuck wearing a second sweater?