Nikon ECLIPSE E400 Instructions Manual page 23

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@ In order to prevent electric shock and damage to the microscope, always turn off the power switch (flip it to the " "
side) and unplug the power cord before replacing the lamp.
@ In order to prevent burns, allow the lamp to cool before replacing it by waiting at least 30 minutes after using.
% Use a 6 V-30 W halogen lamp (PHILIPS 5761).
@ Do not touch the glass portions of the lamp with your bare hands.
Doing so will cause fingerprints, grease, etc., to
burn onto the lamp surface, reducing the illumination provided by the lamp.
If you do get any fingerprints or dirt on
the lamp, wipe it clean.
Confirm that the power switch is off (i.e., that it is flipped to the " >" side).
Securely push the lamp into the socket pin holes as far as it will go. (Do not touch the glass portion of the lamp with your bare
hands.)
Attach the lamp cover securely.