; the foregoing configured to be mounted to the exterior of an aircraft and designed for illuminating egress paths on or around the aircraft during an emergency evacuation (provided for in subheading 9405.40.60) Free No change No change On or before 12/31/2020 . 1631. Wing illumination lights Subchapter II of chapter 99 is amended by inserting in numerical sequence the following new heading: 9902.17.53 Exterior lights, of base metal other than of brass, such lights round in shape, with a height of 11.5 cm or more but not over 12 cm and a weight not over 1.3 kg, each containing a halogen lamp, lamp holder, reflector, autotransformer and electrical connector, the foregoing configured to be mounted to the exterior of an aircraft and designed for illuminating the top surface, leading edge and engine nacelle areas of the aircraft wings for wing icing detection (provided for in subheading 9405.40.60) Free No change No change On or before 12/31/2020 . 1632. Lantern globes of extruded borosilicate glass Subchapter II of chapter 99 is amended by inserting in numerical sequence the following new heading: 9902.17.54 Clear or frosted columnar globes or shades, certified by the importer as of extruded borosilicate glass