I have been using them for several years. They do save power. The
light output from most of the newer ones is very good. The older ones
was not. Two disadvantages. 1. They start out dim and get bright
after a minute. That can be annoying when you run into a room to find
your keys and can not see well at first. 2. In very cold weather they
dont always work right, they flicker and sometimes never get real
bright. In the house they are fine, but in the garage, I tend to swap
half of them with standard bulbs in the coldest months of the year.
One other thing. I have not had real good life from the GE brand.
They burn out way too fast. The other brands have been fine. I'd
PS. I have one in my barn that is on 24/7. It uses 9 watts. Just a
dim light for my horses to see where they are at night. That uses 216
watts per day, which figures to about 20 cents a week. If that was a
standard 40W bulb. I'd be using 960 watts per day, which would cost
about 85 cents a week. (one of these days I am going to put a light
sensor on that thing so it turns off during the day).
So far that light has burned 24/7 for one and a half years with no
problems. I used to use those "under the kitchen counter" 20 inch
florescent fixtures in the barn. They too would burn 24/7. They used
double the wattage, and the bulbs burned out yearly, not to mention
these bulbs cost considerably more, and the fixtures filled up with
On 28 Oct 2005 02:44:27 -0400, firstname.lastname@example.org wrote:
YES. And at around 12 cents / KWH thats roughly 12 cents every 4
days, or about 20 cents a week.
That would totally drive the horses bonkers, and the light would still
go on during the day because it's not real bright in the barn.
What I need is a photocell, but it MUST be outside to work. I already
tried a screw in (the socket) type, it never shut off, too dark in the
barn. Thats why I have not installed it yet, I will have to route a
cable outdoors, put a box and the sensor. Not too complicated, but my
sliding doors are in the way, so it will have to go to the opposite
side of the barn, so by the time I finish, I will have used at least
50ft of cable.
A good way to estimate the annual cost of operation for any electrical
device which is in continuously operation is to "convert" the watts to
dollars. This is based upon an assumption that the cost of electricity
plus taxes is about 11 to 12 cents per kilowatt hour. So, your 9 watt
bulb costs about $9 per year in operating costs, assuming 24/7 service.
If you are getting electricity at a cost which is significantly different
from $0.11 to $0.12 per kWh, then it is very easy to mentally compute
an adjusted annual operating cost estimate. Likewise, it is easy to
estimate the annual cost if the device isn't operating 24/7.
1 watt x 24 hr/day x 365 days/year x 1kWh/1000watt-hr x $0.115/kWh
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