Welcome to The Passion Boxgrow: I have to agree with The Goddess on this. The reason being, that smaller grows are far more challenging to maintain the optimum elements of the grow. I don't know how much experience you have growing MJ but it is a very high energy plant that is also very "need specific". It is one plant that likes its environment to be "just so" for it to do its best. I know you have seen a lot of grows that have been done in a super wide variety of locations. I can tell you that the larger percentage of those types of grows fail, and only the small percentage of those that are successful are the ones put online for everyone to see. Often those that are successful are ones done by growers with years of experience.
That doesn't mean that you can't be successful yourself. It just means that for experienced growers, that type of grow is a real challenge. For inexperienced growers it is often insurmountable. Now, there are several easier ways to do a small grow that are far less painful. You can buy some very nice grow tents that are already set up with reflective walls that make the most of the light energy for the plants, and they are set up with ports of access for you, hoses, fans, etc, that make it so much easier to set up and go.
You must have very good ventilation for them to breathe and cool down from being under the intensity of light all the time. you have to have enough room for the air to move around the plants so that they can breathe and release the water that they do from their transpiration without it ending up running down the walls and getting all over trapped leaves that will rot and mildew under those conditions.
Lighting is probably the least of the issues that you would have to deal with in smaller grows now that we have LED lighting. But many people don't realize that LED lights have their own set of issues to content with when being used for growing in small spaces. An LED light will quickly burn up a plant in a small space if it is kept too close to the plants, due to the intensity of the light beams from each LED. With any other kind of light, the issue is ambient heat from the lights as well as radiant heat from lights too close to a stretching plant.
The grow tent will give you better control over everything, and make it far easier to enjoy a good grow.