I have sourced a suitable housing for the RGBLED board as shown above. Actually the box is a fraction small....So I have mounted the pcb on a piece of plastic and will just sit it in the box on a angle...as shown in the updated rhs pic above...

Since im slaving my leds so that I can have 3 RGBLEDS in each garden lite I need to join the relevant RGB outputs together...Have done this using the RGB colours from 3 pair telephone cable. So led0 , led1 , led2 are joined together , led3 , led4 , led5 are joined together
led6 , led7 , led8 are joined together , led9 , led10 , led11 are joined together..
Led12 is not used...

What I have also done to make the installation easier is to pick a spot to mount the housing and position each garden lite (which already has a 4core lead attached) measure , number and cut to length each cable and then take all lites and housing back to my workbench to fit off. So I only have to mount the housing and fit off the comms cable out in the garden....
All garden lite cables and comms cables are tinned with solder to ensure no strands can short to adjacent terminals...
As shown in the top lhs photo there are 6 12mm plastic glands....Four of these will be used for garden lights and the other two will allow a four core power + comms cable to loop in and out ...
If only one comms cable I put a short piece of cable in the unused gland so I can tighten the gland to ensure no moisture gets in...
The housing gland entries are actually tapped m12 as I was concerned that they might be too close to put lock nuts on.
The terminals on the pcb are very small so I decided to add some external terminals for power connections ,as there will be loop in loop out power and also a positive wire from each group of leds.. Have hot glued the power terminals to the housing as shown in the rhs photo.
If you look closely you will also notice a toggle switch located next to the plastic glands. The allows me to power down the board if required.
Several of these boxes have been prepared and will be situated in suitable locations around the back garden.

Once the garden light pcbs arrive will put some more pics up ...
More Soon
PCB,S