Yes yes, ready-made rope lights are common and inexpensive. But they don’t come in the color combination we favor for outside decorating (red/green/warm white) and idiot possums ate the lights last year and the year before so we didn’t bother with them this year.
The lights in question are by Philips and they’re standard mini-lights of the non-LED variety. This website says that they’re “mini” light bulbs and they’re 1/4 inch in diameter which seems correct.
However, the length (each are 1.5" from where the socket base meets the wire to the tip of the bulb) surely makes a difference and don’t the bulbs need some air flow to keep from burning out? The latter sure seemed to be an issue in my car until I left off the cap for the rear lights’ compartment.
So, what diameter do you recommend for the tubing? I’ll buy several yards of it and cut it to suit the length of the light strings so how long isn’t an issue.