I have been photographing outdoors for a while... Now is time to move indoors... I will be shooting full body models... In a house... I like using permanent lights, specially the adjustable ones... So I can see how it is going to look... Also they give the model a nice yellowish tone... But people tell me that the only way to have a very professional look to my shots is by using flash... Everyone agree? Have you ever seen professionals (true professionals) using permanent adjustable lights? And what should I look for? What are the good brands? A really appreciate your help.