It's an old reliable with a history of good service, the FB40T12 u-shaped
fluorescent light bulbs. These are sometimes called U6 bulbs by the
distance between the legs of the lamp, which is 6 inches. With the advent of smaller light fixtures
such as 2x2 fixtures, manufacturers developed a lamp which could fit into that
space and also have a great light output. Like most
fluorescents, FB40T12 super saver fluorescent light bulbs are a great way to
save energy over standard u-shaped light bulbs. Compared to it's less efficient
the FB40T12, the FB40T12 super saver u-shaped is definitely an improvement which will save you money
in the long run. They operate on 34 watts instead of the standard 40 watt
version. There are many people changing these out to a FBO32T8 which is
even more energy efficient. Of course, the ballast would need to be changed to an
electronic ballast, as the magnetic ballast for the lamp will not operate T8's, but the socket configuration is identical. You can tell the difference between a T12 and a T8 by measuring the
diameter of the bulb. The FB40T12 bulb will be 1 1/2 inch in diameter, compared to 1
inch for the FBO32T8 light bulb. The spacing between each end of the
u-shaped tube is 6 inches regardless of whether it's T12 or T8. The old
technology T12 is the standard cool white or warm white
lamp that's been used in offices throughout the world and the logical energy
saving replacement would be the 3500K or 4100K FBO32T8 lamp. As with all fluorescent bulbs, they rely on ballasts inside of the fixtures
in order to make them work. Almost all fixtures for these bulbs come
with ballasts already mounted and wired. The ballast is important because it is
specific for each type of lamp. You can't change from one type of
fluorescent to another without changing the ballast in most cases. On some occasions there may be a ballast that is made for several different types
such as in the case of T8 lamps. Most of the time the ballast and the lamp are
matched electrically and so it's good to make sure the ballast you have is the
right one for the lamp you choose.
You can get these in almost any color you want including the
more desirable full spectrum light. The full spectrum has
special phosphors that give it a similar color to daylight or natural sunshine.
These are also available in FB40T12 u-shaped fluorescent light bulbs. It produces
light the way our eyes naturally use it, giving better visual acuity and
reducing problems like eyestrain. But fluorescents can come in many other
colors as well and are identified by their Kelvin temperature. Some of the
choices are 3500K, 4100K or 5000K and depending on your color scheme, one of
these color choices will work best for your situation. The 4100K or cool
probably the most popular as it offers a clean, efficient light used in offices
almost everywhere across the country and throughout the world. However, if
you want the whiter full spectrum color, then the 5000K color temperature would
be the one you want. Many suppliers don't have all the variations of color
in this lamp, but we do. We even have this lamp in a Vitalite which is
probably the premier full spectrum tube in the industry.
We keep plenty of these in stock so you will always have a good
source to buy from, eLightBulbs.com. Use us for any type of light bulbs you
have, but keep us in mind the next time you're looking for something that isn't
all that common. And because the FB40T12 u-shaped fluorescent light bulbs are made by Sylvania, you know that
you're going to get the best service from Sylvania's premier online distributor, eLightBulbs.com. Having the light bulbs you need like this one make us
special among others, we have the entire Sylvania catalog available to you.
That means you get the best quality light bulbs and service to
your home or business.
Because it's still very pervasive in many office environments across the
country, we make the FB40T12 fluorescent light bulbs a substantial part of our
offering. There will probably never be a time when these will not be in use.
Remember that there are many types of fluorescent lighting, we describe some
of the most common used in commercial lighting here. Whatever type of
fluorescent you choose or have, you will be saving energy while getting the
most light you can for your money. We have a large inventory of
fluorescent bulbs for nearly every type of light fixture in the field. If
you need help identifying a light bulb, our customer service
representatives can help you determine what you have.