if you are just talking about regular lights, just about any bulb system will work as long as they are within wifi range and you are using the proper hub/gateway. I use tcp connected bulbs for my outside lights and had them long before getting the echo. If you are talking about flood lights, tcp connected used to have flood light (they made changes so not sure now) and they worked the same.
There are wall switches where you can replace the switch if you have a neutral wire but may not work if you have more than one switch to the same light. I know wemo has that limitation. Dont know about the others.
the only disadvantage of using bulbs is if you, family or guests turned off the lights manually, then it would have to be manually turned on before using the echo or and if you have it turning on automatically.