477 H7 LED fog lamp polarity

Hello I am making a lamp for my cabin using a brand new, high power LED vehicle fog lamp bulb(very long story) and a crystal bowl as the lampshade. Although the bulb was very expensive from a uk high st.retailer Halfords, it has no markings with polarity, and both spade connectors are identical. Plus there is nothing noting it's wattage or amperage. (I cannot take it back just yet I live in France 600 miles from the shop. I need light to work by) I have a switch, and a cig lighter socket and plug but need to know how big a fuse to add. I have a standard multimeter. I am not clued up about electronics at all but I do understand the absolute basics. Also, most frustratingly, I have read that LED vehicle bulbs have to match polarity so how do I tell which way to wire it? If I guess incorrectly the first time, will it damadge the bulb? I am using my own spade connections, not vehicle lamp fittings.All The Good Things

Is it a high and low beam type lamp? If so, the frame part is ground and the 2 terminals are positive, 1 for high and the other for low beam. If it is a single element lamp, one of the terminals is positive and the other is ground. Connect power via a 2 amp fuse to 1 and ground to the other. If it does not illuminate reverse the wires.

@i am an idiot Thanks so much for such a speedy concise reply. I will follow the instruction asap and let you know. Am pretty sure it is not high/low beam as it would be labelled on the box as an extra selling point. All The Good Things