How do I set up smart lamp with Sleep As Android? What do I need to buy to make it work?

I am completely new to the smart light world. I have considered getting one for a while now, because I do have trouble getting up after the alarm. I do wake up, but I feel so sleepy! Usually I lay in bed for a while until I feel that my head has cleared - and it may take an hour! I believe smart light device would help me… But what should I get? I browsed Philips Hue on Amazon, but there are so many options and do I also need the “bridge” or not? I wouldn’t want to spend money needlessly. I also see that there are options to integrate other (cheaper?) smart lamps using Tasker, but I really would need a How To for that… Can somebody help me? Probably it exists somewhere, but I haven’t found it.