Nice work! We are putting up our lights too. I like the bulbs on the string lights to be regularly spaced and oriented. One can buy plastic clips that latch onto roof gutters or shingles to hold the cone bulbs in a fixed orientation and spacing

Unfortunately, I can only hang my lights around the facade made of plaster (stipple), brick and wood. I don't want to tarnish the facade with hooks or nails and want a solution that can be reattached each holiday season without effort. I tried positioning the bulbs with removable clay/putty, hot glue but none of these temporary adhesives worked well.

The solution I settled on involves driving (permanent but relatively inconspicuous) threaded inserts into the facade at wide spanned intervals - tee-nut inserts [1] for wood and molly bolts for stipple/plaster surfaces [2]. I ordered aluminum bars ($1 per foot on Grainger) that will screw into these inserts during the season. These bars will let me use shingle clips to hold the light bulbs in the desired fixed span and orientation. For Halloween, I can attach led light strips to the bars to give more custom lighting effects.

[1] https://www.mcmaster.com/tee-nut-inserts/ [2] https://www.mcmaster.com/molly-bolts/