The only time you will see alternating Green & Yellow lights is when you vacate the runway. For example, if you are landing 25L and roll to the end to vacate on K1, you will see alternate Green & Yellow. If the Stop Bar is turned off and you are lining up 07R, you will see only Green Lights. The yellow lights are uni-directional and the other side of those lights is uni-directional Green. All other lights are omni-directional Green. This means that wether you see alternate Yellow/Green or all Green is dependant on wether you are vacating or lining up.
All specifications for Runway Lighting, and markings and signs are found in ICAO Annex 14 Volume 1 (Aerodromes). Specific to the original question, lighting is found in Para 5.3.17 & Stop Bars is found in Para 5.3.20. Hong Kong complies with ALL requirements specified in Annex 14. Your company should have a copy of this.
If you have any more queries, PM me and I'll put you in contact with the guy who looked after all of this for CAD from well before Chek Lap Kok was opened.
Last edited by ClearedIGS; 29th September 2019 at 04:24.
Reason: my spelling