During the routine maintenance of the LDR Nota 18/36 fixtures, I discovered that our lamps were going bad within a short period. I discovered I needed to change the DTS socket. Till date the DTS sockets I purchased are in good working condition and the lamps haven't failed since then. Without a good DTS socket, the lamps do not stand a chance for longevity.
The con for me which is not too relevant is for the thread-like wool that covers the rubber wire should be a bit firm at the base.During screwing and adjustment of the cable in the fixture while replacing, it can pull off. But since it doesn't affect the wire itself, there is no cause for alarm. I just like my work to be tidy.