Electrical - Light String
https://smile.amazon.com/gp/product/B0757KHM56/ref=ox_sc_act_title_1?smid=A1332HU59Q57NY&psc=1 $65.44 + tax for 2 strings - 18 bulb holders
https://www.costco.com/Feit-48%27-LED-Filament-String-Light-Set.product.100405061.html 24 low power filament LED bulbs in string for $40 + tax - 24 bulb holders
https://www.harborfreight.com/24-ft-12-bulb-outdoor-string-lights-63483.html $20 for 12 sockets. Includes incandescent bulbs but can replace with LED;
Outdoor String Lights by Deneve - Heavy Duty Hanging Market Patio Cafe Pergola Rope String Backyard Lights Pro Weatherproof Commercial Quality Bistro Umbrella Festoon Garden Lights 48 Feet Long (Bulbs Not Included)
https://www.amazon.com/gp/product/B00J4CUO3S/ref=oh_aui_detailpage_o01_s00?ie=UTF8&psc=1 $44.95 for 15 sockets 3' apart. $39.95 on sale
Search on Amazon for "Light string".
https://www.amazon.com/String-Light-Company-Commercial-Suspended/dp/B004EWFXMU $27.20 when on sale
Use 1" conduit clamps to hold each bulb.