Jimny Gen 3 roof LED bar installation

Hello Jimny people,
I am writing on this forum for the first time since I have aquired 2005 Jimny GEN3 JB43. My plan is to upgrade it a but, so first mod will be roof LED bar on the front and 2 spots on the back. I have custom full frame roof rack that will serve as a holder. LED equipment will most probably be:
- Hella Black Magic LED Slim Lightbar - 32 or 40 Inch for the front (up to 210W)
- 2 x Hella Black Magic LED Cube Lamp - 3.2 Inch for the rear light (80W in total)
Can you please give me your thoughts on the:
- Wiring diagrams
- Wire dimensions (AWG/mm2)
- Switch proposal since I would like to separate front from rear lights
- Where to lead wire through the body
- Position of the firewall () pass where to lead wires from the battery
- ....
Whatever your experience is, please share. 
Also, if there are some related topics, please share also.
Thanks a lot.

My suggestion would be that you forget about forward facing, roof mounted lighting, it looks fabulous, but in actual use, it can be quite disappointing.

First problem is glare, you'll need to mount it far enough back from the leading edge of the roof that the light does not hit the bonnet, otherwise the resulting glare will almost literally destroy your night vision.

Assuming you can do that, you'll very rapidly discover that what your roof mounted lights will do is illuminate any dust (or rain), suspended in the air, in front of the windscreen - in my experience, very distracting.

I'd rather run a good quality light mounted at or around headlamp level - make no mistake, it will illuminate the dust, but it's a lot less distracting than roof mounted lights.

fordem wrote:

My suggestion would be that you forget about forward facing, roof mounted lighting, it looks fabulous, but in actual use, it can be quite disappointing.

First problem is glare, you'll need to mount it far enough back from the leading edge of the roof that the light does not hit the bonnet, otherwise the resulting glare will almost literally destroy your night vision.

Assuming you can do that, you'll very rapidly discover that what your roof mounted lights will do is illuminate any dust (or rain), suspended in the air, in front of the windscreen - in my experience, very distracting.

I'd rather run a good quality light mounted at or around headlamp level - make no mistake, it will illuminate the dust, but it's a lot less distracting than roof mounted lights.

+1 I would tend to agree with this.

www.bigjimny.com/forum/attachment/43311

Mounted far enough back, and low enough I think it work just fine.
The dust or rain it lights up is above my Main line of sight and if there is too much glare I can switch it off. Typically with snow. 
This a slim and low single row bar and not insanely powerful.
165w osram bar, 3x100w halogen. 

I have just discussed with two of my friends that already have Hella Black 32". One of them has mounted it on the roof further from the windshield and he has no issue with flare and second one has it mounted just above windshield and he might have sometimes flare on the windshield, but nothing critical. I plan to mount it further from WS on the roof rack. This was good point though.
If you have any other suggestion, for wiring or montage, I would really appriciate  

I have not done roof wiring on a Jimny, but, on a couple of different vehicles I have run it out the factory grommet for the back door wiring, up the space in the door shut (where the hinges are), and then under the rubber cap into the roof channel.

Both of those vehicles came with factory mounted longitudinal roof rails, so the cable then went into the rail and through it to the front of the rails.

The picture of your gen 3 Jimny shows a roof channel, so this type of wiring might be possible.