Do they make light bulb converters that will still allow a light bulb?
At my parents house, we used the exact same set up using the screw in adapter for bulb/ outlet. We connected a standard light bulb and plugged in a two bulb fluorescent light strip, to provide light over our washer/ dryer. The extension cord was stapled safely away from the heat of the light bulb. This setup was used exclusively for lights, and nothing else for 20+ years with no problems (and that set up is still there as we speak) I'm not promoting this set up in any way or form, just stating our experience.