My adventures in LED home lighting

Other Types of Lights LED Light Bulbs
44

I finally got all of the Phillips 10W MR16 bulbs mounted. Although they are rated at less than 500 lumens, my meter shows more light at the center of the living room (15 bulbs around the edge of the room) than with the (supposedly) 900 lumen 50W halogens. They also have a much better beam profile than the halogens.

I also found that one of my recessed cans had a broken wire on the MR16 socket. Because UL rules require there to be at least 6” of high temp wire on the connectors, they don’t sell just the socket. You have to buy them with wires attached. Easy to splice onto the old wire. I soldered the connections and used teflon heat-shink instead of wire nuts.

Now my only remaining incandescent bulbs are in the microwaves, fridges, and oven. Plus two chandeliers… I have bulbs for those on order ($265, ouch!).

45

I got in the chandelier bulbs and installed 21 of them in one of the chandeliers (I thought that it used 18 bulbs). It’s WAY brighter than the old 5W incandescents. I’d say that dimmed down 1/4 output, it is still brighter. Each LED bulb has 30 5mm 2900K LEDs in it, so 630 LEDs total.

Getting to the other chandelier is going to be a royal PITA. It is under a 6 foot diameter round dining room table that is currently covered in crap. It is a bitch to move, so I will probably just climb on the table and pray that it does not topple… I can’t tell for sure how many bulbs are in it. I miscounted on the other one by 3 bulbs… I hope that I have enough…

One potential bad thing about LED bulbs in chandeliers is that the color does not shift as you dim them. That effect can be useful for mood lighting.

46

How is the dimming function on the LED bulbs, in practice?

Is it linear? The compact fluorescents were NOT.

47

Yes, all the decent LED bulbs tend to be nice and linear. All my light switches are Lutron Diva’s rocker switches with the little side dimmer slide. The 120V bulbs typically dim over a 10:1 range (checked with a lux meter). I thought that the range was less, but the lux-o-meter don’t lie.

Those candelabra bulbs dim over a 30:1 range. In the powder room with 8 bulbs, it is kind of strange. Full dim setting is around 25%, below that they get a little brighter. Does not happen on the 21 bulb chandelier.

Those Philips 12V MR16 bulbs are in Halo fixtures (transformer on each fixture?). They dim down to about 0. On a circuit with 6 bulbs, some are on but flickering at minimum and others are off or on very dim. Increase the level a smidge and they are all on nice and steady. If you turn on the lights while they are dimmed way down, the give a couple of short, bright flashes before stabilizing.

One thing to be aware of is a lot of cheap dimmers don’t like to be lightly loaded and may have issues working when there are just a few LED bulbs on a circuit. I suspect that is why a lot get returned to stores (and why New Life Electronics has a steady supply of “used” bulbs to sell). The Lutron Diva seems to be the gold standard for LED compatibility. I have some with only a single 8W bulb on them and they work great. Almost all the LED bulb makers list them in their compatibility lists. They do make a LED specific dimmer, but the incandescent one works great for me.

48

I opened this to look at pictures but there isnt any here :frowning:

49

My dad works for a guy who owns a strip mall. And for the all night outside lighting, they use those sodium err whatever bulbs. And they are $20 each, and they need to be replaced twice a year! It’s rediculous…

Only problem is that he can’t put in regular cfl’s or incandescents because they need to be like candle stick thickness. It’s just overhead lighting too, so omni directional is not needed. Anyone got any suggestions for led ones?

We were just thinking that because the bulbs are already $40 a year in IDK, maybe 4 dozen lights, he might as well buy an led equivalent for the same price, but only have to replace every 3 or 4 years.

50

lots of interesting articles here, especially this one The modules are pretty expensive, but pay off time is usually in the 3-4yr range taking into account reductions in energy expenditure and maintenance.

Some of the biggest savings come from smart controllers that dim the light at preset times but can come up to full brightness instantly when triggered by a motion sensor.

51

I am afraid you are SOL. All the LEDs Ive seen that have decent output have substantial heat sinkage with fins. Do they have regular sockets, or the funky 2 pin looking ones? You might try out 1000bulbs.com which seems to have a large browsable selection. You might find something there that could work.

52

I finally got around to replacing the under-counter G4 halogen lights in the kitchen with LEDs… all the gruesome details here: Hera halogen counter light Nichia 219 retrofit

53

I am taking a rather cautious, slow approach to replacing and upgrading my lighting. I did the same thing with CFL bulbs, and as a result found out for myself how quickly they fail when installed “upside down” in recessed cans and track lights, and how frequent on/off cycles kills them. This is now well documented, of course, but several years ago, when we were all being told to scrap our incandescent bulbs, most people seemed oblivious to these problems.

My first step was to attack my kitchen track lighting which probably accounts for almost half the lighting usage in my house. I have fourteen PAR20 halogens in track fixtures, plus three traditional 75W BR30 bulbs in cans. Close to 1,000 watts, and these are on at least three hours a day. Most lighting in my house is controlled with a central computer, triggered by motion sensors, so the lights are turned on and off as people enter and leave the room. Thus, the lights cycle on & off a LOT, and instant on is mandatory.

My search for the “perfect” 50W halogen PAR20 replacement led me to the Sylvania 78748 bulb. You can read about it here, and also read my review (it is under the same user name as my name in this forum):

Sylvania PAR20 LED

As I note in my review at that site, this bulb is actually brighter than the halogen bulbs, but it is quite a bit cooler in color temperature than its 3000K rating would suggest. I actually did a color measurement (you can measure color temperature by taking a photo of a white card in RAW mode, and then correcting the color in the Photoshop RAW import dialog: Photoshop reads out the color temperature in that dialog) and found these results: the Halogens measure at 2900K; the Sylvania measures at 3150K and the TCP bulb that I purchased later measures 2850K.

The TCP bulb:

TCP LED9E2692027KFL LED 9 Watt PAR20 40 Degree Flood Light

has more even illumination, and is almost the exact brightness as the halogens, but the CRI is lower. This gives the light a slightly “less pleasing” quality. Incandescent bulbs have a CRI of 100, meaning they put out equal amounts of every color in the visible spectrum. By contrast, LED bulbs only emit discrete color bands within the visible spectrum. Those bands still combine together to produce white light, but the missing colors make you interpret what you see in slightly different ways.

The best way to describe CRI is that the average of the numbers 1, 5, & 9 is 5; the average of 1, 2, 3, 4, 5, 6, 7, 8, & 9 is also 5. If the two sets of numbers each represented the discrete colors in the spectrum of a light source, the second set would have a higher CRI. The “missing” colors in any LED bulb’s “white” light is why you may have had the feeling that you are not quite perceiving or seeing things as clearly when something is lit by an LED bulb.

So, for me, I have not quite made up my mind between these two bulbs. The Sylvania is more expensive ($38) compared to the TCP ($26); the Sylvania is brighter than the halogen; the TCP is the same brightness; the Sylvania hass more pleasing color than the TCP, but is bluer than the halogen; the TCP has more even illumination, and the beam spread is much closer to the narrow flood spread in my halogen bulbs.

I am not quite yet ready to replace all my halogen bulbs, but these two bulbs are very close to being the right choice.

54

I used the same Sylvania bulbs in my kitchen and office (20 total). I have the ability to measure color temperature and light output. These measure right at 3000K-3050K and 550 lumens… dead on to what Sylvania says. I have not seen any shift in output or color temp over time.

With halogens I was replacing at least one bulb a week and when a bulb blew in the kitchen it would often take out a couple of others and the $35 dimmer. None of the LED bulbs has failed. Highly recommended.

55

I just had one of the Sylvania 10W PAR20 bulbs die. I was browsing BLF in my home office and the LED suddenly turned into a DED (dark emitting diode). That bulb was installed the week of 24 Feb 2012… pretty much exactly one year ago. It will be interesting to see how Sylvania handles warranty claims.

56

Some states allow 120v /- 5% at your house, others allow/- 10%.
If your house voltage is above the high side for your state its public utility commission might be interested in hearing about it.

57

I have high voltage… even 130V bulbs didn’t last. And obscenely high water pressure.

I’m assuming that LED bulb failure was just a random thing. We’ll see. In the year it was working, at least 4 or 5 halogen bulbs would have died in the office.

58

If they don’t make you return it open it up and post it’s guts on here, interested to see who’s LED it is using etc.

59

Well, since it’s from Sylvania/Osram, I’d assume it’s Osrams.

But then their PAR16 bulbs have four XML’s. I did take apart one of their 15 watt PAR38 bulbs. It had a array chip on it… looked like it may have been from Citizen. That bulb died because it blew an internal picofuse.

60

You may be able to use a buck-boost transformer in the buck mode to reduce your house voltage and a pressure regulator to put your water PSI at between 20 and 80, commonly 40 to 60.

61

I took my DED light bulb back to whence it came. They plucked a new one off the shelf and gave it to me (they kept the old one). I asked the guy how many LED bulbs (out of the thousands that they have sold) have they had to replace… a grand total of 4 bulbs (2 Philips PAR38 bulbs, my Sylvania PAR20, and a Sylvania MR16)

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I knew some of their stuff did use Cree LEDs, that’s why I was curious, always cool to see where our stuff is being used.

63

What type of wood cabinets are best suited for LED lighting?