There are no tickets for it at
Disneyland, unless Disney manages to find a way to allow more seating for it. People just gather around and stand to see it. The people with seats are the invited guests -- VIPs, Club 33 members, etc.
It is a wonderful Ceremony, and if you love Christmas music and Christmas in general, it is worth seeing. It's quite lovely.
There is no effect on Magic Morning -- at least, not that I have noticed. In other words, I have not made the connection between Candlelight and anything that happens during Magic Morning (such as crowds or opening times), so I don't think there is an effect.
There are usually 2 Candlelight performances each night, in the 5:30 p.m. and 8 p.m. range (give or take 15 minutes). The fireworks and parades are worked in around those times, or after. I don't know if the Candlelight performances will still be at the same times, or if the times will be altered slightly to accommodate the fireworks and parade, but it will all work out one way or another.
Crowds in the parks are usually pretty substantial on Candlelight weekend -- not only due to the people who come out to see it, but also due to the people who are trying to avoid it, and who pack into Disneyland earlier in the day to get their rides in before escaping to DCA later at night. Still, I have gone to DLR on Candlelight weekend more than once, and my Sunday experience was that the crowds were not bad earlier in the day, but by late afternoon Main Street was a madhouse. Last year there were a few events going on over the same weekend, so the crowds were crazier than usual. On Monday I noticed a definite drop in crowds.
This year is different, however, in that the parks are already really crowded due to Halloween Time and the 60th anniversary. I suspect that the combination of the Holidays, the 60th anniversary, the new Season of the Force event (Star Wars-themed) and other school breaks and smaller events will make for a really crowded park for most of the rest of the year.
Stay tuned to the Disneyland at Christmas/Holiday Season Superthread. We have talked a lot about Candlelight there, as well as all other things related to the holiday season at DLR!