Assertion: general service lamp | /r/HasAspect | a medium screw base
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Source sentences:
text: As currently defined in T20, general service lamps are incandescent, CFL, LED, and OLED lamps intended for general service applications, having a medium screw base, having a lumen output not less than 310 lumens or more than 2,600 lumens, and capable of being operated at a voltage range at least partially within 110 and 130 volts.