I seem to be getting more and more jobs that already have some lighting but want it to look better or right. The fixtures I'd like to talk about tend to be the nightscaping footliters or illuminators, tulip deliters, all of which use the bayonet base 1141's or 1156's. Although I'd like the deliter to be more "out" than "down", I really have no problems with these fixtures performance other than the bulb/base. even long life 13.8 volt versions of those bulbs seem to need replacement once, twice, sometimes 3x per year on those "on all night long" clients. I have changed out to bi-pin sockets on illuminators and footliters, which requires you to do some drilling with a step bit. time consuming, probably 15 minutes per fixture, but solves the problem and lets you use g6 bi pins for the rest of the life of the fixture. I have tried the adapter sockets, which goes in like a bulb and adapts it to a g4 or g6 bi-pin. many times these exceed the cost of a socket, but are quick to do, but most are rated only for 20 watts. I use 35 watts in paths probably 1/3 of the time. this would allow you to use bi-pins in the future, but you will still have the maintenance of replacing some of those plastic bayonet bases over the years that the adapter goes in . There are the halogen bulbs with the bayonet base, but those bulbs tend to exceed the cost of either a socket replacement or an adapter, and are the fastest solution, but I usually only find them in 20 watts, and that leaves you with a much higher residual cost every year on your end with yearly bulb replacements. I looked at several LED bayonet base bulbs, most are made for auto's, and I found 2 or 3 that actually publish lumens and color temp, will work for a/c voltage and those bulbs are the most expensive option, fast, and theoretically will not require yearly replacement. I have not tried these. of course, many folks knee jerk reation is tear it all out and replace it/warranty it with what you sell. I have done that as well, but it feels wrong to do it in many cases when it seems like a quality fixture, it is just a few years old and in perfect shape, it just needs to be wired properly and placed right and have a bulb that lasts a year. I feel better about the tear out thing if the customer is frustrated with the system and says they want something "good" but if the customer likes what they have and wants to just add on, tear out/replace really does not seem like good advice. what do you guys do ?