The first is that it comes from a country that doesnt follow the same electrical conventions as the united. There are two pairs of wires in from the supply voltage and two pairs of wires out to the light fixture.
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Light fixture has two black wires no white. Apologies for the correction. The these are the neutrals from the supply to the light fixture. The wall box has the typical one black and one white wire with ground. It also has a green ground wire that appears to have not been. My new fixture has black and white wires. Connect the lead wires from the fixture to the black hot wire in the electrical box by twisting a wire connector to the ends of the lead and hot wires.
Used in the original installation end is still insulated. Confusion arises because the lights housing has two black wires but no. An overhead light fixture. There are three reasons a light fixture may have two wires that arent color coded. Its essential that you determine which black wire is hot before proceeding. Repeat these connections with the two white.
My light fixture actually has one black wire and 2 separate white wires connected to two screws on the existing light fixture. However if you need to rewire a light switch or a plug socket you may occasionally come across two black wires. I am confused as to where should i connect the white and the black the fact that there is no black wire used by the existing light fixture. The easiest and safest way is to use a multimeter to test for current. Black means hot white signifies neutral and green indicates ground.