Kichler's lamp requires two bulbs. This model should be used outside, perfect for improving the lighting on your porch.
From Debenhams
Ashland Bay 1 Light Bathroom Flush Outdoor Ceiling Light Zinc IP44 E27 - Grey - One Size
Lights2Go
Kichler KL/ASHLANDBAY/F Ashlandbay 2 Light Outdoor Ceiling Flush Weath