How to add light lamps in a night scene/light up a night scene

Hi. I want to add lights to a night scene, for example road lamp lights or fluorescent light tube on wall of a building etc....and with the capability of emitting light as well. whats the easiest way to do it? i ll be rendering in iray. Also what are the regular ways people use to light up a night scene in iray would help. Thank you.
Post edited by videoninja719 on
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sorry forgot to mention, it is for outdoor night scene in iray
thanks
You have two choices - for many shapes of light you can use a point light and in its geometry settings give it the size and shape of the light source, or you can use a model of the light source and apply the Emissive sahder preset to its surfaces.
You might look around for IES profiles for street lamps. Typically, the specs for the street lamp will also give you settings for color temperature and flux in lumens.