My apartment has an old outdated heating and air system. In the summer we burn up and in the winter we freeze. It runs our electric bill up way too high. The landlord's excuse is that it works and it has to do with the weather being too cold or too hot. He sent his maintenance guy out to check it out and he's certainly not a professional. Also the smoke alarm has a shortage as it beeps all the time. The landlord just tells us to change the batteries but I've done that several time. What should I do about this situation?
Instead of a flashlight, think of a pistol. Imagine that you are in space, and you fire your pistol at some distant star. The bullet will travel at some finite speed toward that star (rather slower than the speed of light, but bear with me). Now, imagine that after you fire the pistol, you decide you don't like the pistol anymore, and smash it to pieces. Now the pistol is gone. What happens to the bullet you fired before you destroyed the pistol? Nothing, the bullet keeps right on going, it isn't affected by the destruction of the pistol at all. Change the word bullet to photon, and you've pretty much got it. Edit: Okay, let's clarify. Instead of a pistol, let's say it's a machine gun. You hold down the trigger until the entire belt/magazine/whatever is empty. Then you destroy the machine gun. All the bullets will keep flying through space, at something like evenly spaced intervals. After the first bullet reaches you, there will still be another hundred or so bullets to come. Once ALL of the bullets have reached you (and not one bullet before), THEN there will be no more bullets coming toward you. Similarly, we observe a star throughout its life, then ending (for example) as a supernova. Once the light of the last fizzle of the supernova reaches us, no more bullets (er, photons) reach us, and we see only darkness.
It really depends on what you're racing and plan to race. Personally I'll always rock out a single piece three layer suit. It is approved for every kind of racing I would ever do. With that said, read your rule book requirements for each club you plan to race with and buy the suit based on that. FIA 8856 is a good bet or SA 3/5. Do not buy a cheap single piece suit. They tend to be very bulky and hot. It's better to buy a suit that is too large rather than too small. If your suit is too tight, the fabric will not burn away properly.
Try Simpson Race Products, or there is a small company in Indy called Hinchman Racewear that has been making fire suits and crew uniforms for over 50 years. You better hurry on Hinchman, they do all custom stuff and once open wheel season gets going they will be too busy for consumer orders. With Hinchman they will actually make one to your own design in any of a couple dozen colors.