Hi guys, Doctor Doom was my ride for 2 years. I was a trainer there. Unfortunately, you guys are wrong about the lights on top of the towers. Our ride operations manual states that both towers are 199 feet tall, the same height as Tower of Terror, therefore not requiring a red blinky light. The lights on Hulk's cobra roll are simply there for decoration, as one was not operational for the longest time. Hulks highest point in the track is 110 feet, therefore there is no way the ride is over 200 feet tall requiring red blinky aircraft lights.
I'm not sure what you guys are talking about seeing Doctor Doom having an FAA red light at the top, because there isn't one. When the park closes and the ride goes into maintenance mode and tech services are climbing the towers, they turn on several WHITE maintenance lights that illuminate their climb up. You'll notice if we run the ride with guests at night, those lights are not on, the towers are completely dark, not lit up at all. These white lights are NOT the FAA lights, and the ride does not need them, as the ride is under 200 feet.
I agree, the ride should have been built taller, as the red blinky lights would fit the theme of the Island, but for whatever reason, they kept them 1 foot shorter. It may have to do with more paperwork or something for a structure over 200 feet, but oh well.