Hi All We have 4x Dimension 610 dimmers from Lightprocessor on a couple of our sites which seem to eat triacs for breakfast. The load on these dimmers is either 2x 500w P64s or 2x1000w P64s - either way under the 10A load of the channel. They were shipped with BTA12 triacs which, as 12 amps should be protected by the 10A ceramic fuse... but just about every time a lamp blows the triac (and fuse) blow too. The lamps are from GE I think, supplied by SLX, so not cheap ones or anything, and its been ongoing since the installation so rules out an iffy batch or anything. We have tried upping the rating of the triacs each time and are now on something like BTA48s (massive great things) which (so far) havent blown, but everything below has. Lightprocessor tech support didnt seem that interested, just said keep putting bigger triacs in... but surely this shouldnt happen? Is it a design fault, or something else going wrong? The two installations in question were done by the same company but about 2 years apart. And anybody who is on the ball will notice I have just posted a thread in the Electrical & Power forum about a potential wiring issue on a site with Dimension 610 dimmers. Yes is the answer, that installation is one of these. Therefore I had assumed the triac issue was related to that, but its happening on a seperate site which isnt showing any other problems as per the other thread. Any ideas? Ta Nick