Cite
HARVARD Citation
Institution,, B. (2018) Product standard covering luminous signs with discharge lamps and/or LED (light emitting diodes) and/or EL (electroluminescent) lightsources with a nominal voltage not exceeding 1000 V, with the exclusion of general lighting, traffic- or emergency related purpose.. [Online]. London : British Standards Institution. Available from: http://access.bl.uk/ark:/81055/vdc_100172731825.0x000001