Led vs CFL

[MazenAJ]

Well now you have uncovered a dirty secret. LED efficiency is not what they claim. When they rate them they do so with a brief pulse, at room temps, and in the middle of the focused beam. They do not count the power being used you feel as heat.

Example they may rate a LED @ 100 L/watts for a 1 watt LED, but it burns 3 watts of power with ballast.. That makes it a real 33 L/watt or about the same as a plain old fashioned Edison incandescent bulb.

Hey there Sunking, I just signed up here to get some information about LED diode brands, I have been studying trying to make a good LED product, and I have seen test reports on lights with power usage and lumen output, I never saw these numbers that you claim. I don't know if I misunderstood you, but these calculations are done not on the chips but on the entire product light with diodes and driver, for example 7x1w diode inside a PC milky cover and driver consumes total of 8.1W and gives 555.7Lumens with 100-110Lm/w chip

[zdalighting]

I have the same problems

I also am facing the same problems and don't know why. Hope some one can tell me how to fix the problems.

Thank you, guys

Mod note - free advertising is not allowed.

[Naptown]

smokemaker mabe you were jumped on a bit hard. But you have to see it from how the "oldtimers" on here see it. If you post a link on a first or second post telling about something amazing the first thing that jumps into our heads is"SPAMMER"" mabe your genuine and have something interesting to tell. Dont give up just get one of the products you think is useful and in some way connected to solar or electricity saving and THEN post results with the link. That way we will have more faith in your post.. OK??

Eloquently said.
Thanks John!

[john p]

smokemaker mabe you were jumped on a bit hard. But you have to see it from how the "oldtimers" on here see it. If you post a link on a first or second post telling about something amazing the first thing that jumps into our heads is"SPAMMER"" mabe your genuine and have something interesting to tell. Dont give up just get one of the products you think is useful and in some way connected to solar or electricity saving and THEN post results with the link. That way we will have more faith in your post.. OK??

[Naptown]

Sorry Sunking, I don't think of myself as a SPAMMER.

Is this a tough place to be or did I start out wrong?????

Sorry if I started out wrong, I was just try to share something I found at the store.

(disclaimer, I do not work for or own stock in the store)

You may not be a spammer however someone dropping a link on their first post is suspicious.
Try them let us know how they work write a review without links.

[SmokeMaker]

Another SPAMMER

Sorry Sunking, I don't think of myself as a SPAMMER.

Is this a tough place to be or did I start out wrong?????

Sorry if I started out wrong, I was just try to share something I found at the store.

(disclaimer, I do not work for or own stock in the store)

[Naptown]

Taken care of for now

[Sunking]

Hi, I'm new here and I have been reading the archives. I'm not trying to hijack the thread, I just wanted to bring this new product to your attention. I will be getting a few and testing them.

Mod note Buy a few and try them before posting link

Another SPAMMER

[SmokeMaker]

Hi, I'm new here and I have been reading the archives. I'm not trying to hijack the thread, I just wanted to bring this new product to your attention. I will be getting a few and testing them.

Mod note Buy a few and try them before posting link

[Designer_Mike]

I got some time to do some testing this weekend.

I used an existing string of lights and just unscrewed bulbs.

With one bulb on, my string was drawing .829 amp (yep, 100W bulb)
I added two 9W LEDs and current went up to 1.008 amp

I removed the 100W bulb and was left with .143 amp

After 5 minutes I only saw a rise to .145

If you change all the lights on some dimmers out to LED you may get some ANNOYING flickering since there isn't enough load for the dimmer to be happy. Adding one CFL into the string seems to take that away.

I will measure them again after they have been on for an extended time.

[Sunking]

I'm kind of surprised they generate that much heat with such low energy consumption.

Well now you have uncovered a dirty secret. LED efficiency is not what they claim. When they rate them they do so with a brief pulse, at room temps, and in the middle of the focused beam. They do not count the power being used you feel as heat.

Example they may rate a LED @ 100 L/watts for a 1 watt LED, but it burns 3 watts of power with ballast.. That makes it a real 33 L/watt or about the same as a plain old fashioned Edison incandescent bulb.

[Designer_Mike]

they have a LOT of mass to them. I assume to help sink the heat away.

They do get fairly warm/hot...I can grab them and hold on but just barely.
I have been pretty disappointed with the CFL life and the slow warmup is annoying.

I'm kind of surprised they generate that much heat with such low energy consumption.

[Mike90250]

Keep us posted on the lifetime. We know LED's are more sensitive to heat that the CFL's were, and hot CFL's burn out pretty quick. Notice how the bulb mounts in the fixture and how the heat path works.

[Designer_Mike]

I was just going to post about how impressed I am with the new LEDs but decided to piggy back on this thread

I bought a couple to try out and see where the color falls/power comparison is.

OH MY GOD>> I was blown away. I swapped a 75W halogen out with an 8W LED from Phillips and it is impossible to tell the difference with the light. They don't seem to have quite the same range with the dimmer but it is very close.

I had planned on installing occupancy detector switches on some of the lights that seem to always get left on but heck...the cost to power the LEDs is so little, it would be better for me to buy the LEDs and just leave them on instead of spend $45 on a fancy switch. (4) 6W bulbs will cost me less than $30/yr to leave on 24/7

Sorry for the hijack

[john p]

?????

I can never understand why prople ever get short life from CFLs on MSW inverters. WE run at home ALL our CFLs ONLY off MSW 400w inverter and I have set other peoples lightinglike this and no one is having problems. Also at work we have never measured any differences in lifespand between running them of MSW or TSW inverters.
I have found that Philips CFLs definately last much longer than anyone elses no matter what you run them from

One of the main advantages of LEDs over CFLs ,if 12v ones are used it you dont get inverter losses which can be high if you just running one or two 14w CFLs on a 1000w inverter,