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2. Here are the best places and deals to shop during after ... - AOL

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   Walmart: The mega-retailer's end-of-year sale has massive discounts that rival (and often beat) Amazon on vacuums, kitchen appliances, bedding and clothing, to name a few.

3. The best Halloween decor to shop during Walmart's Holiday ...

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   Walmart's big October sale is chock-full of discounts on indoor and outdoor decor to ... Costway 8-Foot Dead Tree and Pumpkin Blowup with LED Lights. $73 $139 Save $66. See at Walmart. YouPins ...

4. Walmart's early Black Friday deals are rivaling Amazon ... - AOL

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   Even better, there are two baskets, so you can cook two different foods at once. For a limited time only, score this must-have kitchen gadget on sale for $127 at Walmart, while it's $170 at Amazon ...

5. Electrical ballast - Wikipedia

   en.wikipedia.org/wiki/Electrical_ballast

   A typical 230V, 50hz series choke ballast (inductor) used in older lighting. This example is used for a tanning lamp. It requires a starter switch (below). A lamp starter, required with some inductor type ballasts. It connects the two ends of the lamp to preheat them for one second before lighting.

6. Lighting for the elderly - Wikipedia

   en.wikipedia.org/wiki/Lighting_for_the_elderly

   So far, two lighting methods have been shown to improve nighttime sleep in AD patients: (1) exposure to bright white light (at least 2500 lx and as high as 8000 lx at the cornea) for at least one hour in the morning, for two weeks and (2) exposure to 30 lx of blue light from LEDs, peaking at 470 nm at the eye for two hours. The light, or the ...

7. Sodium-vapor lamp - Wikipedia

   en.wikipedia.org/wiki/Sodium-vapor_lamp

   A high-pressure sodium street light in Toronto A high-pressure sodium-vapor lamp An HPS lamp that isn't entirely off. A sodium-vapor lamp is a gas-discharge lamp that uses sodium in an excited state to produce light at a characteristic wavelength near 589 nm. Two varieties of such lamps exist: low pressure, and high pressure.