The sample luminaires shall be held in place and subjected to a single 7 J (5 ftlb) impact, using the impacttest apparatus described in Clause 16.21, falling through a vertical height of 1.29 m (4.24 ft), on surfacesbeing tested.The number of samples and the sequence of the procedure shall be in accordance with Figure 13.2.3.1.Test results shall be acceptable if:a) electrical spacings comply with Clause 3.11; andb) accessibility of uninsulated live parts complies with Clause 3.13.2.13.2.3 冲击 13.2.3.1样品灯安放在适当位置，受7J（5 英尺.磅）的物体的冲击，使用16.21中描述的冲击测试工具，从1.29米（ 4.24英尺）的高度垂直落下测试其表面。13.2.3.2样品的数目和测试方法的顺序需和图13.2.3.1一致。图13.2.3.1 冲击测试方法。(见13.2.3.2)13.2.3.3可以接受的测试结果情况如下：a) 灯体间隔与3.11一致b) 非绝缘的导电部件的可达性与3.13.2一致。 16.21 测试工具：