My definition of a budget light is one that has "economy". In other words, good "bang for the buck". My Convoy S2+ is a good example. It's bright, small, has decent runtime, and built well, all for around $20. You could spend a LOT more for a 1X18650 light, and get a flashlight that has few PRACTICAL improvements over mine. I don't care if the body is made of rarest unobtaneum, gold plated, has a diamond lens, and runs off unicorns, I care about how good it is at being a flashlight for the money. That means an expensive flashlight to me is one that cost too much for what your'e getting. A CHEAP flashlight to me is those rubbishy plastic-y ones you find in a dark aisle in Walmart. Those are terrible, and I do not consider them budget because you will end up spending more on them in the long run.