What are the different home pregnancy tests?

Bronwyn
Please excuse my ignorance here and I don't mean to offend anyone but I thought I would ask the question here as everyone posts their test results here. What are the different types of home pregnancy tests and which give the best result? I'm and only new to TTC and have never actually taken a test before. It seems all the ones I see are really faint and hard to tell if it is positive which is obviously why it is posted on here but why are they so faint? I would assume  a positive result would come up pretty clear. Why is it some tests are really faint and others are really clear?whne my sister did her tests they came up pretty clear almost immediately, is each brand different and one better than the other? I apologise if this seems like a rude or stupid question but I don't want to set myself up for disappointment or excitement when the time comes for me to take a test by getting a brand that is going to make me question whether or not I am pregnant or make me wait an extra week or 2 just to get a stronger result.