... Sealed body, it is well water proof LZ Signal LightApplicationThis light can send red, yellow, green, three diffient ... lighting signal separetely, it issue the instructiion for helicopter ... 2. Wall-type installation.3. Equip the special marine signal bulb.4. Sealed body, it is well water proof ... 5n.mHalogenΦ19-Φ21G5.3red,yellow,green LZ Signal Light