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2. Trouble light - Wikipedia

   en.wikipedia.org/wiki/Trouble_light

   A trouble light, also known as a rough service light, drop light, or inspection lamp, is a special lamp used to illuminate obscure places and able to handle moderate abuse. The light bulb is housed in a protective cage and a handle that are molded to form a single unit.

3. Lightbulb socket - Wikipedia

   en.wikipedia.org/wiki/Lightbulb_socket

   GY6.35 & GZ6.35 – same as G6.35 and only denote what lamp mount clip is needed to hold the actual light bulb in place; G8 – 8 mm (0.31496 in) pin spacing GU8 – same as G8 and only denotes what lamp mount clip is needed to hold the actual light bulb in place; GY8.6 – 8.6 mm (0.33858 in) pin spacing; G9 – 9 mm (0.35433 in) pin spacing

4. Test light - Wikipedia

   en.wikipedia.org/wiki/Test_light

   Probes must be well-insulated, with minimal exposure of live terminals, with finger guards to prevent accidental contact, and must not expose live wires if the test lamp glass bulb is broken. To limit the energy delivered in case of a short circuit, test lights must have a current-limiting fuse or current-limiting resistor and fuse. The HSE ...

5. Incandescent light bulb - Wikipedia

   en.wikipedia.org/wiki/Incandescent_light_bulb

   An incandescent light bulb, incandescent lamp or incandescent light globe is an electric light with a filament that is heated until it glows. The filament is enclosed in a glass bulb that is either evacuated or filled with inert gas to protect the filament from oxidation. Electric current is supplied to the filament by terminals or wires ...

6. Fulton MX991/U Flashlight - Wikipedia

   en.wikipedia.org/wiki/Fulton_MX991/U_Flashlight

   Four versions of the TL-122 were eventually developed, all utilizing exposed slider-type light switches (no switch guard): [4] During the 1950s, French armed forces (Forces Armées Françaises) issued its own version of the TL-122(D) supplied by a French contractor. TL-122. Original model with #14 screw-base bulb based on the Eveready Model No ...

7. Driven guard - Wikipedia

   en.wikipedia.org/wiki/Driven_guard

   The basic principle is to protect the sensing wire by surrounding it with a guard conductor that is held at the same voltage as the wire so that no current will flow into or from the wire. This is typically achieved using a voltage buffer/follower that matches the guard voltage to the sensing wire voltage, or in low-voltage differential sensing ...