I was right. And with the help of my friend who tagged along with me on that night, we discussed about the mixture of colored gels and which lighting method to use. For this nocturne photograph, both lighting techniques are applied. Let me explain how this photograph was made.
The first light-painting with a 1-million candle light power searchlight, covered with a lavender colored gel, was applied on each pillar on the right side, which also spill some light over onto the left-side wall. This helps to eliminate the dark shadow area, revealing more details and textures.
Next, I walked over to the left side of the staircase and using a green colored gel on my flashlight, I popped twice onto the stairs. Thereafter, I walked all the way to the end of the corridor and keep myself out of sight from the camera. With my searchlight, I switched it on and shone yellow light onto the ceiliing for about 10 seconds. That's it! Total exposure timing is 172seconds.
I really love these 3 colors as they match so well together. Basic color matches play an important part in nocturne photography and just like art paintings, it's the photographer who (as the painter) decides what color to match and to use colors to convey emotional message or express certain feeling, in their work.