- Do you think I should use the 120cm pendant or 160 cm ?
technically, there is no different.
I suggest 160cm. it is little longer than tank, looks profect.
2 pcs light on 1 pendant and the 3nd on the other.
- Do you know what is the maximum height of the adjustable hangkit ? I have a pretty height ceiling.
60cm normally
please you can also ask saler give you some hang-cord FREE to extend the length if not enouth.
Please is 120cm length engouth ? 12 pcs you need..
Ask FREE , I can sure you get it . :)
--do I need to rebuy some spare part of everything will come with the kit ?
--I am not sure I've kept the other part of the RS90
There is no any spare part need to rebuy. only the pandent.
please Keep the "L" board which is black and connect the light and arm.
- I've seen the upgrade cost from controller to Wifi is 50, where as the price for the new RL90 is 135
If your tank is near your home WiFi router. I suggest "update". there are more functions.
I guess the price of 50 is because shipping cost.
Please tell her you want pendant and wifi shipping togeter, and try $20/pcs for each module.
Would please help show us some pictures how pendant looks on your tank after you install them.