I once planned to put indiglo under the dash in both driver and passenger side and is wired to light up everytime either doors open; good illumination for the floor especially when getting inside at night
Putting a set up like this costs around Php350 in Banawe. Cheaper if you DIY. But they use stock single contact bulbs and sockets, not indiglo. Ganun ang footwell ng Pajero ko. I got amber bulbs to match the gauges.