Such tests will be made as are necessary to prove the adequacy of a lamp or any of its parts in fulfilling the purposes for which it was designed. These tests include the following:
- (a) Safety tests, including tests of safety devices, electrical contacts, and explosion-proof features.
- (b) Photometric tests.
- (c) Tests to demonstrate adequacy of mechanical strength.
- (d) Tests of nonspilling features (storage-battery lamps of class 1).
- (e) Temperature tests.