It is your call which exterior/interior lights you deem need LED replacements, no doubt they are not as power hungry, put off way less heat than incandescents, and in most cases deliver more lumens than their counterparts. As for online LED quality compared to store bought overpriced LEDs, it all depends where or who you purchase them from. I have purchased our LEDs from both types of sources and it has been a toss up, we purchased over 90% of LEDS online from reputable sources, at a fraction of the costs of store bought we have been pleasantly surprised with zero duds over the many years.