LED light bulbs vs flourescent light bulbs - electric consumption

[oj88]

Last month, a few things happened at home. I bought a large-screen LED TV and a 5.1 home theater system. That was also the same month I replaced most of our CFLs with LEDs.

For me, it's all about diverting electricity to the cool "stuff". You can look at it in a way that you can add more appliances at home without your electricity bill breaking a spot of sweat. So, even with the addition of the big TV and HT, my bill came out about half a grand cheaper than in June.

To put things into perspective, the CFL bulbs I replaced had a cumulative wattage of about 234W. The LEDs that replaced them have a cumulative wattage of only 66W. That gave me around 168W to play with. The HT+TV uses about 115-125W at the outlet (LED TV ftw!) and needless to say, I still have change left.

[fourtheboys96]

700 isang piraso? Grabe ang mahal pala.

Gusto ko sana palitan yung mga bulbs sa chandelier para mas matipid.

IMO, LED bulbs is practical if you will use it for an extended period of time (e.g. 24/7, overnight daily, etc)

Otherwise, I will personally just use CFL due to price difference.

[CVT]

^^^ Good for you, bro.

I'm still waiting for the economies of scale to kick in.... (It will, sooner or later)....

16.5K:weathermanf3:

[Ry_Tower]

^ same here, at home we rarely have lights that is used for more than 8 hours per day. Will wait for cheaper versions for the 8 hour lights.

[crazy_boy]

I think the life expectancy of an LED will depend on the cooling. LEDs get much hotter than CFLs, which is why LED bulbs have built in cooling fins.

The advantage is that the LED bulbs don't have a "charge" time... and shouldn't be as vulnerable to damage to on-off cycles as CFLs... which seem to wear down easily in areas where they are cycled on and off very quickly... like bathrooms.

true.

i bought 2 brands to test. NXled and OMNI. the heat sink of NXled is not to warm to touch, while the heat sink of OMNI is warmer to touch. so which one is better? google is giving me different answers hehe

[shadow]

I'm with CVT I'll just wait for it na bumababa, if I'll replace all the CFL in the house mamumulubi Ako, Sa master BR pa Lang 14 pin lights na, hinde pa kasama Sa CR and closet...


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[userfriendly]

I think it will be more accurate to compare it with lumens. Yung mga better brands has lumens printed on the packaging. For comparisson, my 8watt(680lumens)led is brighter than my old 20watt spiral cfl bulb.

Like what TS said, if 24/7 use naman within a few months ROI na. The rest is savings na.

Yes lumens is the more accurate way to compare brightness. But, cdrking did not post the lumens they just said its about equal to a 40 watt incandescent bub so its a fair comparission.

CDR KING

And their warranty is 1 year with 1 week replacement.

I just bought 2 Osram bulbs. A 2 U cfl 13 watts rated at 805 lumens P99.00 at Ace Hardware and a 18 watt spiral rated at 1166 lumens. Thats what the dti sticker says. I dont know why you find the LED brighter than the 20 watt spiral. I'm guessing its due to the age of the spiral cfl. CFLs tend to loose brightness as it ages. I forgot the term for it. LEDs do not suffer from this.

[crazy_boy]

Yes lumens is the more accurate way to compare brightness. But, cdrking did not post the lumens they just said its about equal to a 40 watt incandescent bub so its a fair comparission.

CDR KING

And their warranty is 1 year with 1 week replacement.

I just bought 2 Osram bulbs. A 2 U cfl 13 watts rated at 805 lumens P99.00 at Ace Hardware and a 18 watt spiral rated at 1166 lumens. Thats what the dti sticker says. I dont know why you find the LED brighter than the 20 watt spiral. I'm guessing its due to the age of the spiral cfl. CFLs tend to loose brightness as it ages. I forgot the term for it. LEDs do not suffer from this.

probably because of the age also. LED looses its brightness din after 50% of its life. nabasa ko lang somewhere.

[userfriendly]

sa mga high ceiling it is feasible. huwag lang sa mga low ceiling ung skylight. tatagos talaga ung init.

You are correct. That was my mistake. My roof was too low so heat transfer was awful.

More than half of the light bulbs in my home has been changed out to LED bulbs of varying wattages (3, 4, and 7W). I'm using two brands; NxLED and GES.

Rough comparison of light intensity between LED and CFL:

7W LED = 20W CFL
4W LED = 11W CFL
3W LED = 9W CFL

These are all 4th generation LEDs, or so I've been told.

Can you pls post the lumens of the LEDs. It will help us compare them to cfls. From my understanding. CFL is about 5X brighter than a incandscent bulb while LEDs are 10X brighter. Meaning a 20 watt CFL is roughly equivqlent to a 100 watt bulb while a 9 watt LED is about equal to a 90 watt bulb. I know there are a lot of other factors to consider such as reflector, color, temp etc... but as a ball park I think it will do.

If anyone knows a cheap source for LEDs to replace FL bulbs, I'm interested in buying. Need to save.

[shadow]

For me the savings will only be realized If you replaced all your existing bulbs to LED.. Pero naman you'll be spending a big sum of money still not worth it


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[crazy_boy]

For me the savings will only be realized If you replaced all your existing bulbs to LED.. Pero naman you'll be spending a big sum of money still not worth it


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hindi naman kailangan all bulbs. important are the bulbs that operates at least 10 hours or more per day. yung mga nasa bedroom na ON lang 2-3 hours a day, hindi pa justifiable to replace to LED cause the ROI will take years. but if 24/7, 6 months max ROI ka na. meaning bababa na agad electricity bill mo on the first month.

savings may not be big, but you will still save. at the end of the day, savings din naman yung habol.

You are correct. That was my mistake. My roof was too low so heat transfer was awful.



Can you pls post the lumens of the LEDs. It will help us compare them to cfls. From my understanding. CFL is about 5X brighter than a incandscent bulb while LEDs are 10X brighter. Meaning a 20 watt CFL is roughly equivqlent to a 100 watt bulb while a 9 watt LED is about equal to a 90 watt bulb. I know there are a lot of other factors to consider such as reflector, color, temp etc... but as a ball park I think it will do.

If anyone knows a cheap source for LEDs to replace FL bulbs, I'm interested in buying. Need to save.

meron sa 168 na mura na LED. may ganito din ako. after 1 year, ang dilim na sobra. ginawa ko nalang night light. mura lang. nasa 120 pesos lang each. ginawa kong pathway light dati. wala nga lang warranty. 1.5w ito. unknown lumens.

[Retz]

diba meron lux meter to measure the intensity of light?

[userfriendly]

diba meron lux meter to measure the intensity of light?

yes, dami lux meter sa sulit

[Phoenix67]

The brand I used was GES 9w led light bulbs - GES 4th generation LED lights

I think they are not as bright as your 36watts flourescents but for the 20watts it should be near.

Can you pls share where you bought the LEDs? Are these the replacement for 36 watts f or 20watts FL? I also want to change over to LEDs to save. Electicity prices are crazy.

[Phoenix67]

.....Important thing sa LED is the bulb kung anong generation na and yung heat sink. Heat will shorten the life of he LED. Mas maganda yung fin type na aluminum yung heat sink. ...

In my search, it seems that the 220v AC power is converted to the working voltage of the bulb by the use of a bridge rectifier diode, some capacitors, a resistor and probably a voltage regulator IC. The resistor will dispate power through heat (so theres the need for the heat sink) and sometimes even the voltage regulator IC will also need a heat sink to dispate the heat.

With this, I would say that the reason for early failure for LED light bulbs is most likely because of the failure nitong electronic components na eto before the failure of the LED per se.

LEDs generally work on 1.5v to 5v (higher voltage will require a resistor), hindi ako sure kung ganito lang din kababa ang voltage requirement ng fourth generations LEDs.

[oj88]

I was bored, so I did some informal bulb comparison tests. I compared four light bulbs (1x LED and 3x CFL) to see how they perform against each other.

Again, these results should not be taken as absolute. I did these experiments using parts I already have so your mileage may vary. For instance, a spiral CFL will almost certainly yield more light output, Watt for Watt, compared to the straight-tubular CFLs.

From left to right: 7W LED, 11W CFL, 20W CFL, and 23W CFL (all are designated as daylight)


The camera settings for the pictures below were set to full manual. The EXIF data are essentially identical, save for the time and date stamps. In all of the shots, the light sources were affixed to the ceiling and were about 2 meters away from the subject.

7W LED


11W CFL


20W CFL


23W CFL


The four pictures have identical EXIF data:

Camera Make: Canon
Camera Model: Canon EOS 650D
Resolution: 1024 x 768
Flash Used: No
Focal Length: 18.0mm (35mm equivalent: 29mm...
CCD Width: 22.71mm
Exposure Time: 0.400 s (1/3)
Aperture: f/16.0
ISO Equiv.: 1600
Whitebalance: Auto
Metering Mode: pattern
Exposure: Manual
Exposure Mode: Manual

Here are my personal observations:
1. First, the obvious. In my test, the 7W LED bulb is about as bright as the 20W CFL.
2. The LED bulb has a slightly warmer color (ie. less washed-out) compared to the CFLs. But it's subtle enough to be perceptible only when the pictures are compared side-by-side
3. If you decide to stick with CFLs, always get the spiral-type. They're more expensive but they are also more efficient compared to straight-tubular CFLs.

[Retz]

^

parang mas interesado ako doon sa london olympics bear mo brad.

[4TUNER]

maganda lang to sa mga more than 8 hours of use other than that CFL na lang.... gumagamit din ako LED pero strip type, kaya lang for emergency purpose (brownout) pair with a spare car battery, LED strips located on specific spot indoor and outdoor....

[Phoenix67]

Kahit hindi naman whole day na nakasindi ang lights, shifting from CFL to LEDs will drop the electricity usage ng lighting system by more than half (I estmate about 60%).

I am maintaining a duplex for bodega.....

The following are my observations:

Flourescent bulbs:
Jan 2012 - usage 71kwh, bill P668.36
Feb 2012 - usage 52kwh, bill P408.83
Mar 2012 - usage 40kwh, bill P284.87
Apr 2012 - usage 77kwh, bill P776.10
May 2012 - usage 56kwh, bill P496.37
Jun 2012 - usage 42kwh, bill P296.14

LED bulbs:
Jul 2012 - usage 22kwh, bill P113.82

We shifted the use of LED.....The cost of the bulbs was twice than the flourescent but if the rate of savings continue, it will pay-off in about 4-6 months.

Update lang ng using LED
Aug 2012 - usage 26kwh, bill P160.97
Sep 2012 - usage 17kwh, bill P22.88 - maraming times na nai-turn-off ang apat na LED bulbs during the day

[crazy_boy]

Kahit hindi naman whole day na nakasindi ang lights, shifting from CFL to LEDs will drop the electricity usage ng lighting system by more than half (I estmate about 60%).



Update lang ng using LED
Aug 2012 - usage 26kwh, bill P160.97
Sep 2012 - usage 17kwh, bill P22.88 - maraming times na nai-turn-off ang apat na LED bulbs during the day

ang laki talaga ng maititipid mo shifting to LED. kailangan matibay lang talaga yung LED.