With simple observations like wattage, voltage and the type of base the bulb has, you can quickly learn what kind of bulb you're dealing with. Make note when listing out your bulbs where they're located. Differently moods or lighting styles can help you know how to choose light bulbs for that room. To make it as easy as possible you here are the most common ways to understand if you are using an LED light bulb:
Understand watts from lumens
Check for kelvin measurements
Double check light bulb labels