Bright white pulsing light over Las Flores Canyon Malibu

Last night between 830 and 930 pm, a blindingly bright clear white pulsing light was blasting through my bedroom window from a sharp (at least 45 degree) angle above the trees, in the exact direction (as the crow flies) from LA County Fire Department Camp 8.  The direction was looking approximately 200 degrees south west.
 In all the 24 years I've lived here I've NEVER seen a light in that window from that direction. It hovered ABOVE the trees.
 My boyfriend and I stared at it for 30 mins, wondering: "is that the Fire Camp's helicopter?" "why isn't it moving?" "if it's emergency vehicle lights, why are they bright white with no red or amber?"  The area is covered in at least 30 foot high oak trees and this light was above them. It appeared as large as if it were a helicopter less than a mile away, but blinding lights, not a single beam of a helicopter you'd see searching for something underneath.
 I fell asleep and by 10 pm it was gone.
 The light was pulsing and so clear bright, it blasted across the canyon to the other side (approximately 1.5 miles across).
 I called the Fire Camp 8 this morning and said: "I'm making a crazy lady call, were you doing helicopter training last night?" I told the captain what I saw and he said "no, the helicopter was not being used last night."  He also told me that the fire captain in San Diego had a similar experience recently and everyone thought he was nuts, but there was no other source of light from a vehicle, plane, helicopter.
 I don't believe in conspiracy theory. I don't necessarily believe in Martians (but I suppose there must be life out there somewhere).
 What we saw made no sense. It was beyond odd.