AIM 8/15/19  12/31/20 FIG 2 − 1 − 12 Taxiway Lead − On Light Configuration TBL 2 − 1 − 1 Runways With Approach Lights Lighting System No. of Int. Steps Status During  Nonuse Period Intensity Step Selected Per No. of Mike Clicks 3 Clicks 5 Clicks 7 Clicks Approach Lights (Med. Int.) 2 Off Low Low High Approach Lights (Med. Int.) 3 Off Low Med High MIRL 3 Off or Low GLYPH<C0117> GLYPH<C0117> GLYPH<C0117> HIRL 5 Off or Low GLYPH<C0117> GLYPH<C0117> GLYPH<C0117> VASI 2 Off GLYPH<C0076> GLYPH<C0076> GLYPH<C0076> NOTES : GLYPH<C0117> Predetermined intensity step. GLYPH<C0076> Low intensity for night use. High intensity for day use as determined by photocell control. TBL 2 − 1 − 2 Runways Without Approach Lights Lighting System No. of Int. Steps Status During Nonuse Period Intensity Step Selected Per No. of Mike Clicks 3 Clicks 5 Clicks 7 Clicks MIRL 3 Off or Low Low Med. High HIRL 5 Off or Low Step 1 or 2 Step 3 Step 5 LIRL 1 Off On On On VASI GLYPH<C0076> 2 Off GLYPH<C0117> GLYPH<C0117> GLYPH<C0117> REIL GLYPH<C0076> 1 Off Off On/Off On REIL GLYPH<C0076> 3 Off Low Med. High NOTES : GLYPH<C0117>  Low intensity for night use. High intensity for day use as determined by photocell control. GLYPH<C0076>  The control of VASI and/or REIL may be independent of other lighting systems. 2 − 1 − 11 Airport Lighting Aids