Lamp Shade Limits:

The lamp hardware I use to rated for use with all bulb wattages.
The limiting factor in any lamp is the size of the top opening of the shade.
If you use too small a shade for the bulb, you can get brown spots on your shade.

 

Top Shade Opening	Thistle Hill Pottery Lamp Size	Bulb Wattage
4 inches across	Wall Lamp	60
5 inches across	Small Lamp	75
6 inches across	Medium Lamp	100
7 inches across	Large Lamp	all wattages

Hardware Information:

On/Off switch on Small & Medium Lamp	3-Way switch on Large Lamp