So you've changed the batteries. You've reprogrammed the remote and the mountain that is your garage door still will not be moved. It's quite possible that your opener's motor may need replacing. Cost for replacing these motors runs around $100 and can be purchased at most hardware stores. If you don't have time right now to fix it, but you still need to open that door, there's a red cord that hangs down from the motor which will temporarily disconnect your door from its power, enabling you to open the door manually.
LED & Florescent lights: I hear you asking “why is this important?”. Both can emit radio and electromagnetic interference that can mask the signal between the smart hub and your opener. If you experience unreliable operation - out they go. The last thing I did was remove an LED lamp from a motion sensor fixture nearby and replaced it with a standard incandescent. Since the light is only on for a few minutes I’m not worried about the power usage if it means the garage door will close when commanded.