Just to set the record straight, simboy is correct - those "red thingies" are not lights, they are the elements of the ILS localizer array.
That ILS was one of the early CAT II installations in Canada and, if memory serves correctly, the berm was built when the ILS was upgraded to CAT II standards.
Maybe the antennae had to be elevated to produce a signal that meets CAT II tolerances, perhaps due to runway slope. In any event I do not recall any indications on airport or runway-specific performance charts that indicated a clearway problem.