Seeking Feedback On Cove Lighting, False Ceiling, L-box

Hi,

As I am researching online for reno info for my HDB resale flat, I noticed that cove lighting is very commonly used nowadays. Most of the portfolios on the ID websites would have this. While I personally love the effect with cove lighting, my fiancee is not in favour of it because it would collect dust and dead insects etc. I am trying to convince myself that aesthetically, the use of false ceiling and/or L-box would also be good even without the cove lighting, but have not been able to find many pics online on designs w/o cove lighting.. sigh.. I have quite a number of questions here and would appreciate any advice given.

1. If you are one of those with cove lighting, how often do you clean the fixture?

2. Getting a contractor to do the false ceiling/L-box seems to be cheaper than getting it done by the ID. However, since I will already be having some carpentry work done by the ID (feature wall, divider, wardrobe), if I were to engage a separate contractor for the ceiling, I am concerned about the "interface" or joints or gaps between the false ceiling/L-box and the top of the feature wall, divider, wardrobe. How would I be able to ensure that everything fits nicely? Or it is advisable to just have the ID do everything?

3. Do you feel that having a whole piece of false ceiling in a HDB flat (which has a lower ceiling compared to condos) makes the place looks more enclosed?

Thanks in advance.