WHERE TO TAKE POWER FEED FOR LIGHTS

Anyone have any experience or knowledge of where to connect new wiring to feed a set of front spot lamps (old-style 55 W) and two Helle rear LED work lights on a TD5 90? I already have new illuminated rocker switches installed in a panel under the radio so power to them first and then onto the lights Obviously the power take-off needs to be switched by the ignition and I would intend to wire the spotlights via a relay activated when the headlights are on full beam.
My thoughts are for the rear work lamps take a feed from the cigarette lighter with an in-line fuse holder in between that and the light switch, using a 10 amp fuse.
For the front spotlights I'm not sure where to take the power, I'm assuming there might be a wire near the ignition switch I could use, again with an in-line fuse, but I'm wondering if there is a simpler solution?
If anybody has an experience I would be very keen to hear and thanks in advance

Full beam warning lamp to power switches via fuse, power to lights from battery, I used a 4 way fuse box to my relays fed from the battery, a bus at would be handy , one for live and if you run earths back to battery use one for earth also. Some people fuse the earth and switch the earths also, whatever floats your boat zi guess.