At rural king they sale 10" heat lamps and lights for 1.99, but they're 250W. I'm heating a 50 gallon tank (4ft long) and it'll be at least 2ft away from basking. While this heat my tank to proper temperature without overheating? Heat lamp:http://www.ruralking.com/light-brooder-10-shade-w-clamp-6ft.html 250W light: http://www.ruralking.com/agriculture/livestock/chicken-supplies/chicken-incubators-accessories/250-watt-clear-heat-lamp-bulb.html they also have a 125W: http://www.ruralking.com/agriculture/livestock/chicken-supplies/chicken-incubators-accessories/heat-lamp-bulb-clear-125-watt.html