Will generic 7 inch headlamps fit my car?

I’ve recently purchased a 1994 NA MX5, and one of the bulbs inside the headlights has blown. I’ve been told that converting to halogen lamps with a removable bulb is a good idea, as currently I have to replace the whole unit. My question is, will any generic 7 inch lamps fit in my car, or is there another specification I should be looking for?

submitted by /u/unboundfromtheground
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