Can you replace incandescent bulbs with LED bulbs?
Correspondingly, can I use an LED bulb in an incandescent fixture?
When it comes to replacing old incandescent bulbs with LEDs, a common question that customers ask is: “Can I use an LED bulb that has a higher wattage equivalent than my fixture allows?” The simple answer is yes, as long as the LED bulb uses less wattage than your fixture.
Correspondingly, can you replace incandescent Christmas bulbs with LED bulbs?
The short answer is no. You can't use LED replacement bulbs (if you can find them) to replace traditional mini lights on a traditional light string. LED light strings have extremely low wattages and require far less power than the standard incandescent light string.
Many LED tubes are "plug and play", meaning you can just install them like you would a fluorescent bulb. For this to be true, look for bulbs that are "ballast-compatible" meaning that they can use the ballast already installed in your fluorescent fixture to power the LEDs.