Roe Ring
When you say you are looking for a stove set up for LIGHT use, do you mean not very often or light in weight.
To be honest, either way you literally have hundreds of options, and this will depend on which direction you wish to buy from/go along with.
I have only been only this site for a short while now, and have noticed lots of posters seem to use the same heavy kit (often exactly the same), with a lot of it being ex military (which often mean: heavy, made by the lowest bidder, and designed to be carried in webbing, not a pack). While I am not going to discourage users from their beloved crusader cups etc, they are heavy, not the easiest to clean, and do not fit well on all stoves. Being made of steel, they also transfer the heat of their contents to the rim of the cup, so are harder to drink from than alloy/titanium, and loose their heat more quickly. That said, they are possibly seen as 'bushcrafty' so are bought by bushcrafters lol. There are of course a multitude of alloy/titanium pot/cups on the market, which will be easier to drink from, easier to clean, and will often have a wider base, so will cook your food/brew more quickly (less fuel needed). The bushcraft marker is quite small in terms of numbers of items sold when ciompared to the normal outdoor market, and items like the crusader are simply not bought by hikers/backpackers as they are seen as not good enough/too heavy.
As for stoves, there has been some good advice given so far IMHO, and yet again there is a big choice of fuel available to you. you could go along the route of: gas (butane, propane, butane/propane mix), petrol/white gas, meths, wood, esbit, hexamine etc. You will need to consider what fuel will be best to use, and if you are thinking about wood, will it be available when you camp or will you have to take it with you. You can buy a nice well made stove, which may cost lots of money, or you can just make your own. Even as a first time maker, you should be able to knock up a coke can stove in half an hour (and about five minutes once you have practiced a fair bit).
Water bottles are also in plentiful supply from a wide variety of manufacturers, and you could go along the 'bushcraft route' of buying a '58 water bottle, or you could simply use an empty lemonade bottle, which would effectively be free. The lemonade bottle (I use 500ml and 1L versions), are very light, hardly ever break (literally last for years), can be rolled up to stop them sploshing your water as you walk, or rolled up to save volume in your pack. You can place them over embers on your fire to heat the water inside (the bottle must be totally full to do this).
Sorry to not be much help, but there is a lot to consider in just choosing a cooker lol. I just wanted to point that out, as well as to just put in a quick word about military kit. I like many others on this site are ex military, and many of us know that while military kit is very strong (why why on earth do you need something that strong for a simple walk in the woods...your not at war lol), it is usually not that well designed or made (as in lacking features or modern design), and is often very heavy (as it is designed to be idiot proof, for folks who won't look after it), and usually made by the lowest bidder. This is fine if your idea of heaven is to drive one of those ultra cheap Tata cars from India, but I suspect many folks will have a more refined car, as they prefer something better designed, and modern.
Just a few thoughts