I'll echo what has been said about avoiding Feit Electric. We redid our
kitchen a little more than 3 years ago and have about 7 of the Cree
in-ceiling lights, and they're great. We also have 8 PAR38 cans in the
basement, and I replaced all of those incandescent bulbs with Cree LED
bulbs about a year ago, and all of those are still just fine.
We have some CF lights in some places where I just turn the light on and
leave it on for hours. I have seen plenty of evidence that short-cycles
with fluorescent bulbs leads to short bulb lifespans. I won't buy any more
CF bulbs. LED is just as cost-effective, and doesn't have that pesky
mercury (and is not as fragile).
For security lighting that isn't on for long periods, incandescent is still
a very cost-effective solution. I bought a security light with built-in
LEDs, and haven't installed it yet. I'll report back what I find. It isn't
high-powered for distant wide-angle coverage, it is designed for over an
outside doorway or similar.
Regarding light color, I have found that the 5000K and up bulbs are far too
cold/sterile/harsh for my liking. I have found that (to my eye)
temperatures between 3000K and 3500K (typical mid-point color temperature
choice) yield the most "natural" lighting, and are often mistaken for
conventional/halogen incandescent.
-Peter
On Thu, Nov 6, 2014 at 10:05 AM, Peter J. Thomas <pj_thomas@comcast.net>
wrote:
> On 11/5/2014 6:39 PM, Randall wrote:
>
>> so I'm thinking of replacing and considering LED.... I know the cost
>>> difference but I like the low wattage and long life expect... my
>>> question
>>> is the light output how do they compare watt for watt as far as flood
>>> light
>>> illumination !!! are they as bright ?? fill me in led gurus
>>>
>> Actual "watt for watt" they are much brighter, the difference is roughly
>> 7:1. However, watch out for "equivalent watts" as they frequently don't
>> tell the right story. Compare lumens, not watts.
>>
>
> The ratio for halogens will be a little lower. Halogens are more
> efficient than non halogen incandescent. Probably closer to 5:1 but still
> a significant savings. Randall is correct, lumens are a better comparison
> but if you don't know the lumens a good guess is 100W LED fixture.
>
> Daylight bulbs are little more efficient than soft white. LED bulbs are
> actual florescent because they use phosphors to improve the quality of the
> light. A white LED without phosphors produce a bluish light, guessing
> 7000K, so phosphors provide a color shift by absorbing the 7000K light and
> remitting 5000K. The higher the kelvin light color of the bulb the higher
> the efficiency. Though I stick to a kelvin around 5000K. Higher than that
> you are might be wasting energy producing colors that you can't see well;
> meaning though a 5000K and a 6000K might put out the same lumens the 5000K
> will seem brighter because your eyes can see all the lumens.
>
> Peter T.
>
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