https://community.usa.canon.com/t5/Speedlite-Flashes/600EXll-RT/m-p/285570#M696 <P>a1714,&nbsp;<BR /><BR />I understand your Speedlite 600EX RT- II gives off a sporadic afterglow.&nbsp; It's possible you are seeing something powering down inside the unit or it may be a trick of the light when coupled with the ambient light in the room.&nbsp; If the flash behaves otherwise normally, I wouldn't consider this to be a service issue but if it gets hot or doesn't expose properly because of it, then I would recommend setting up service on the Canon web site.&nbsp;<BR /><BR />usa.canon.com/repair</P> Sat, 02 Nov 2019 20:41:04 GMT Tim 2019-11-02T20:41:04Z https://community.usa.canon.com/t5/Speedlite-Flashes/600EXll-RT/m-p/285559#M695 <P>My Speedlite 600EXll RT is giving me a&nbsp;sporadic after glow after a flash exposure has been taken. It does not happen all the time. Flash is set for ETTL and is only 2 1/2 months old. It is like, the flash goes off, that exposure is perfect and then a after glow appears for about 1/2 second. It is like someone turned a low power lightblub on then off.</P><P>&nbsp;</P><P>Any Ideas???</P><P>Thanks,</P><P>Steve</P> Sat, 02 Nov 2019 18:01:14 GMT https://community.usa.canon.com/t5/Speedlite-Flashes/600EXll-RT/m-p/285559#M695 a1714 2019-11-02T18:01:14Z https://community.usa.canon.com/t5/Speedlite-Flashes/600EXll-RT/m-p/285570#M696 <P>a1714,&nbsp;<BR /><BR />I understand your Speedlite 600EX RT- II gives off a sporadic afterglow.&nbsp; It's possible you are seeing something powering down inside the unit or it may be a trick of the light when coupled with the ambient light in the room.&nbsp; If the flash behaves otherwise normally, I wouldn't consider this to be a service issue but if it gets hot or doesn't expose properly because of it, then I would recommend setting up service on the Canon web site.&nbsp;<BR /><BR />usa.canon.com/repair</P> Sat, 02 Nov 2019 20:41:04 GMT https://community.usa.canon.com/t5/Speedlite-Flashes/600EXll-RT/m-p/285570#M696 Tim 2019-11-02T20:41:04Z