BS 5971:1988

National foreword
Brief history
Technical text
Section one - General
1 Scope
2 Definitions
Section two - Safety and interchangeability
                requirements
3 General
4 Marking
5 Protection against accidental contact in screw
    lampholders
6 Resistance to torque
7 Insulation resistance of B15d, B22d, E27/51 x 39
    capped lamps and other lamps with caps having
    insulated skirts
8 Accidentally live parts
9 Creepage distance for B15d or B22d capped lamps
10 Lamp cap temperature rise (delta ts)
11 Safety at end of life
12 Interchangeability
Section three - Assessment
13 Whole production appraisal by means of
    manufacturers' records
14 Conditions of compliance by means of manufacturers'
    records
15 Batch appraisal
Appendices
A (normative) Package marking symbols for dichroic
                reflectorized "cool beam" lamps
B (normative) Holders for torque test (Clause 6)
C (normative) Resistance to torque following heating
D (normative) Operation to failure test
E (normative) Proposed induced failure test
F (normative) Acceptance criteria - continuous
                variable result
G (normative) Miscellaneous test procedures
H (normative) Other international publications quoted
                in this standard
National appendix W
National appendix X
Cooperating organizations

Specifies safety and interchangeability requirements of lamps and also the method a manufacturer should use to show compliance.