Hi Robert. You wrote:
<I' m looking for CE marking emc standard to apply to luminous signs. At a first glance the EN 55015 "Limits and methods of radio interference measurements of light equipments ..." seems to be the right one, but... a sign light may have dimensions well beyond a household light! > For my money, you are on the right track with 55015. This standard makes allowances for the fact that lamps which use Ionized gases as the light source often behave badly on start up, and I think the standard allows 5 minutes running for the lamp to 'settle down' before measurements need be taken. I used that standard to qualify a very low pressure high intensity UV source used for metal surface analysis - now THAT was nothing like a domestic lamp, but did behave very badly while it sorted it self out, vacuums stabilized, temperatures got high enough and the rough edges of the internal metal parts got etched away! Luminous signs are usually neon or a rare gas, and after switch-on must behave a bit erratically, at least until they warm up and reach a stable operating condition. 55015 allows for this. Good luck. Chris Dupres Surrey, UK.
