4-1/2" Round Super-LED by Whelen Engineering, these lights will retrofit into existing housing on Police Motorcyles.
TIR6 Super-LED lighthead with adapter, fits both 4" round and PAR-36 (4-1/2") applications. 10 Scan-Lock flash patterns, (with Phase 1 and Phase 2 for simultaneous and alternating flashing lights) steady-burn and synchronizable capability, 4-1/2" diameter.