This is a standard tungsten bayonet-style bulb rated for 20 watts at 110-120 volts.
It is the correct replacement bulb for National Optics Advanced Microscope as well as for older Home Microscope models that use tungsten lighting (The current Home models use LED or fluorescent lighting.)
If you're unsure which replacement bulb to buy, take out your current microscope bulb and match it to the photos on our website.
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