LOW INTENSITY AVIATION OBSTRUCTION LIGHTS (LIOL)
- Type A (Intensity>10 cd)RED-STEADY BURNING LIGHT
- Type B (Intensity>32 cd)RED-STEADY BURNING LIGHT
- Type B (Intensity>32 cd)RED-FLASHING LIGHT
LIOL-A or B aviation obstruction lights should be used for structure with H ≤ 45 m during night time
Note: If those are considered inadequate or a special warning is required, then medium – high intensity aviation obstruction lights should be used.
LIOL-B aircraft warning lights should be used either alone or in combination with MIOL-B. (This rule is also valid for object with height included between 45 m and 150 m above ground level.