It's not a myth. I've blown several over the years and tend to disconnect
my "standard" lights on my duck boat trailer. Of course, I usually put that
in the water when the temp is 40 deg or so. You might try putting it in
without disconnecting but have spare bulbs with you, have someone check the
lights before leaving and be prepared to change the bulbs. I think buck or
so for a couple of bulbs is well worth not having to disconnect the lights
every time. If you do have a problem, you might consider a set of the LED
lights for 40-50 $. I just put a set on my 20 footer . In addition to the
bulb problem I also had the high corrosive action of salt water. If so, be
sure to fill any connectors w/silicone before crimping ot otherwise
waterproof.
LD

"Mr Wizzard" wrote in message
...
Heard from some that you should disconnect
the tailer lights before putting your trailer in the
water. I can't see why you'd do that. Are they
worried about a hot bulbs shattering when hitting
the cold water ? Is this a myth, or is this
something I should continue to do (pain in ass)