This is not a must. HID bulbs are not that hot and will not affect the colors of your creation. But if you want to match the colors of your house, then you should buy the same brand and color of your fixtures. For example, if you have a shed with a blue roof, and you want to stick with the theme, then you should buy a light with a blue bulb. Outside lighting is a great source of illumination and can be used in ways that avoid eyesores. So, it is well worth the effort to ensure that a variety of fixtures can be used to illuminate your home or yard. For example, some homeowners opt to use a mixture of lantern-like fixtures and decorative poles when placing their outside lights. This allows them to have a variety of options when it comes to illuminating the exterior of their home.