We use Prime Patio. They're not cheap, but they're commercial quality and use a great looking Edison bulb. What I like is that they offer them in line voltage and in low voltage (12 volt). The low voltage can be cut to the exact lengths you need, so you don't have the usual string light issue of getting to the end and having another 10 ft you have to wrap around something.

These are both great suggestions for larger bulbs. How about for small lights that can be wrapped around an arbor or tree?

The best quality ones you're likely to find are the ones professional holiday lighting companies use.

The "small lights that can be wrapped around an arbor or tree" threw me because I thought you wanted walkway and lights for an entrance. Living in an overlit city I've kind of become a fanatic for dark sky lighting so I thought that walkway lights such as Volt's and a dark sky light for the entrance might be good choices.

Thank you for those interesting articles - although they make my head swim even more about what I should be doing. I share your passion about light pollution. I need to illuminate the way from the driveway through an arbor/arch down a walk to the courtyard and front door - otherwise pitch black. When we first moved here six years ago there were spotlights in trees. One by one they went out and we haven't been able to locate the buried box. After hiring two electricians to try to locate and solve the problem, I decided to just use small LED Christmas lights wound around the arch, and add some strings to the courtyard. I like the look, it doesn't require an electrician and is most affordable. The problem has been finding good quality lights. I will look for commercial lights as suggested, but if anyone has a brand to recommend please do.