Havent try it out yet but I think it should be bright enough for me to move around the staircase kua...as this is the type used in most commercial places. I bought the one in about 1.5' length. There is another smaller one look like a 6" square downlight and another longer version about double the length of mine.

I never know that the emergency light has got to change its rechargable batt...the one in my parent's place is still running good after almost 15 years...

As you can see from the pic below, there is a pin needs to be pulled out after installation.

Spotted same model of recessed emergency lights in Sunway Medical Centre just now..

Yes, this is meant to be recessed into the plaster ceiling just like our downlights. I find it okay to be placed at a corner above the stair case. It is flat on the ceiling but not the protruded type like the oldtimes'. So, it looks okay for me.
If you want a smaller ones, they have a 6" square type just like a downlight fitting.

The charging will be auto right? It is only being used once awhile when there is electricity blackout, hence my parent's has last >15 years and it hasn't been taken down from the ceiling since then..

Putting behind the stairs?? Do you mean the portable type and you store it in the storeroom underneath your staircase? If like that, it just function like a big torchlight lor? For me, the purpose we install emergency light is so that we won't be in total darkness no matter we are at the up or downstairs as it will be lighten up automatically when no electricity. As such, we won't be panic especially for girls and kiddos at home. We will also not hurting ourself moving in darkness....

The water outlet/floor trap:-

There was an unfit gap as u see in the pictures as I just simply put the trap in to take photo...

Following is the outdoor membrane filter from Nesh which has just been installed.

Yup, it was done by their technician. PVC valve is easier to be weared off, and gonna cause leakage then...

Good thing that you are handy. Most of the times, little job also ended up with hundreds... coz they factored in their workmanship, travelling petrol and their time stuck in traffic (for those who lives in klang valley especially)!! Haha...

Not all are 13A sockets, just 6 of it with 3 nos on one looping. Need lots of individual sockets coz i do not want to use a multi sockets as it will further the gap between tv console and the wall. Basically, i need sockets for TV, blueray/disc player, media player, home theater system, etc. Don't you think i really need that many of power sockets?

seems that i've got a new chapter to study now...
Do you think i can get the isolator from the shop i bought switches and sockets? Will consult them for more info...
Thanks bro for bringing this part out.   
I will just switch off the master switch at night before bed...

The master switch is hidden in side the compartment just beside the DB box. See... The little switch there...

Hehe...lazy me...also no confidence can practice that for how long... 

Saw some Belkin's surge protector in Best Denki 1U. Now only that I understand how's the surge protector looks like the power extention and how it functions as a protector. Also, now that I understand that I really do not need that many sockets as you guys said.....  
I think I will get one of those surge protector with insurance coverage like this Belkin's or Cal-lab as recommended. As it gonna be a big amount to be spent on TV and home theatre, It definitely feels better to be covered with such insured surge protector lor...   
I should just leave those other sockets un-used or for the less usage or less valuable appliances then...