http://www.uklightbulbs.co.uk/cgi-bin/site-editor.pl/8/-ecommerce?r=1;eid=P240508;category=OVEN%2c%20Microwave%20bulbs%2c%20300%20degree%20oven%20lamp
First find your lamp (Base Voltage Watts all important)
Take lid off oven
Remove old lamp
Insert new lamp
Good luck...
Peccavi
December 2009