In electrical terminology bulbs and lamps are the same thing. If you are talking about a lamp as a fixture no bulbs and lamp fixtures do no need to be sold together.
There two types of bulbs used for the turning signals. The bulbs on the rear of the car have a flasher built into them. When the bulb with the flasher in it burns out, the flasher blinks faster. You can check this on your car by turning on the turn signal and then check both front and rear lamps. The lamp that is not blinking is the problem and needs to be replaced. Lamps are typically sold in packs of two. So replace both rear lamps or both front lamps when you change either one. Save the bulb that was still working and put it in your glove box as an emergency spare.
They are sold in boxes of 2, 4, and 6 bulbs
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Yes Walmart does sell Arc floor lamps. They sell them in various colors and styles to meet any decor need. Prices range from as inexpensive as $35 to $900. The variety is vast.
Candle light bulbs are sold in most hardware stores. They can also be bought online but if they are bought in stores such as Walmart you know what you are getting.
Large table lamps are sold at thousands of places on line and most are reasonably priced. http://www.overstock.com/Home-Garden/Table-Lamps/32/subcat.html
Overhead projector replacement bulbs will definitely be sold somewhere on eBay or alternatively you could ask the local secondary school or college for help.
Tables and floor lamps are usually sold separately. Depending on the size of the table, it is very difficult to equip it with floor lamps in order to meet the minds of the buyer.
(192 - 120) / 6 = 121212 lamp
You can find information on fluorescent bulbs all over the internet. You can also check packages of the bulbs at department stores or grocery stores where they are sold.
Traditional table lams are sold in every lamps dealers shops. These are also sold in various online retail sellers. Good places to find are also stores like Tiffany's and Amazon.
There is no standard collective noun for the noun 'lamp', however lamps are sometimes sold as a pair of lamps. A collective noun is an informal part of language. When there is no standard collective noun for people or things, a noun suitable for the situation can function as a collective noun, for example, a display of lamps, a row of lamps, a group of lamps, etc.