LED Christmas string lights are request to be compliant with UL588, From 2016，some seller in Amazon starts to study the terms 16 CFR 1120.3(c).
(c) Seasonal and decorative lighting products that lack one or more of the following characteristics in conformance with requirements in sections 6, 7, 15, 71, 79, and SB15 of UL 588 (incorporated by reference, see § 1120.4):
(1) Minimum wire size requirements in section 6 of UL 588;
(2) Sufficient strain relief requirements in sections 15, 71, 79, and SB15 of UL 588; or
(3) Over current protection requirements in section 7 of UL 588.
The following table summarizes the relevant sections and technical requirements in UL 588 for each of the three readily observable characteristics.
READILY OBSERVABLE CHARACTERISTICS FOR SEASONAL AND DECORATIVE LIGHTING PRODUCTS
