TCP is an LED and compact fluorescent light bulb manufacturer based in Aurora, OH. In fact, they are the largest in the world despite the fact you may have never heard of the brand before.
For many years, TCP light bulbs have been produced in TCP lighting manufacturing plants, and re-branded to other, more well known brands. In recent years, they have begun distributing the bulbs with their own name with much success.
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TCP compact fluorescent light bulbs are everywhere! The basic models compete with the major brands in the twist category, while the specialized light bulbs sometimes have no competition at all. The breadth of the CFL line from TCP is staggering and easily the largest we've got. On one hand, having a huge selection is excellent, but if the price is high, then that doesn't matter as much. With TCP bulbs, the price is almost always lower than major brands, which really makes the whole line very popular.
Emerging lighting technology, like cold-cathode and LED are the fastest growing part of the TCP lighting catalog. If you are searching for a longer lasting source of light that actually uses even less energy than CFL bulbs, then LED is something to check into. Technology has been evolving in this area, and lighting manufacturers like TCP have really made huge strides in making LED light bulbs a viable alternative for the mass market.
The TCP cold cathode light bulbs are based on a newer technology that allows better efficiency and a smaller physical bulb size. You can even get these in the decorative chandeleir style lighting, so saving energy in your dining and living rooms is now a realistic option.
If energy saving light bulbs are your top priority, then TCP lights can really help you on your way. You'll have the largest selection with this brand, and often a lower price than better known brands.