I have 3 Strobon Cree (but same sort of thing as firehouse I believe). I bought inexpensive lightweight landing gear and used double stick tape (less bulky and very secure) to put strobes onto landing gear. Put two on either side and one on the bottom rear of landing gear. This way I don't have tape or velcro on the drone itself, as I mainly use strobes at night, not during daylight flights.
I installed it on top, as far forward as possible without interfering with the front props. After looking at an exploded diagram of the spark I felt it was the best location without adding more accessories. Flown 4 batteries through it so far with no problems.