Geekzone: technology news, blogs, forums
Guest
Welcome Guest.
You haven't logged in yet. If you don't have an account you can register now.


Filter this topic showing only the reply marked as answer View this topic in a long page with up to 500 replies per page Create new topic
1 | 2 | 3 | 4 | 5 | 6
469 posts

Ultimate Geek
+1 received by user: 107


  # 1772226 29-Apr-2017 02:55
Send private message

I've found the temperature accuracy listed for a bulb varies depending on the quality of the bulb, at least here in the US.  I'm in the process of replacing 50-60 par30s halogens (downlights) and while the 3000k Cree bulbs are twice the price (and weight) of some alternatives, they are a perfect replacement for the halogens.  If anything the art on the wall below the LEDs look better than when under the halogens too somehow.




14880 posts

Uber Geek
+1 received by user: 2791

Trusted
Subscriber

  # 1772283 29-Apr-2017 08:54
Send private message

Thanks @colinuu, I'll look around for Osram. Bunnings seems to have some.

 

I put some downlights into my house, then discovered how much heat they let out - heaps - and replaced them with more standard fittings.


 
 
 
 


8076 posts

Uber Geek
+1 received by user: 855

Subscriber

  # 1772297 29-Apr-2017 08:57
Send private message

colinuu:

 

Our 1990's house is full of R80 downlights. I found the Philips 3000K lights good for utility areas but too stark for bedroom and living areas. Eventually I found Osram brand 2700K 9W at a specialty lighting shop. They are definitely warmer than the Philips ones and we find them very good, running about 12 months now with no issues.

 

Aside: CFL downlights proved very unreliable due to the electronics being in the hotspot at the top, also the long warm up time was very annoying.

 

 

My CFLs in downlights always start up fast though as they die they will be replaced  by LEDs..





Regards,

Old3eyes


neb

1045 posts

Uber Geek
+1 received by user: 233

Lifetime subscriber

  # 1772449 29-Apr-2017 14:28
Send private message

timmmay:

TLDR;

 

Does anyone know a good brand of LED bulb, 1100 - 1500 lumen (10 - 15W), that's 2700K instead of 3000K?

 

We're starting to gradually replace bulbs with LED, as the 5+ year old CFL fail. I replaced one room with some Panasonic 3000K "warm white" bulbs that my wife finds a bit cold.

 

 

Risky but effective strategy: Replace the bulbs with some other brand of 3000K and tell her they're 2700K. Being able to tell the difference between 2700K and 3000K is almost certainly psychosomatic, if you don't know it's a 3000K LED you won't notice it. In this case I'd say it's just a comparison between the CFLs and the LEDs, they won't be exactly identical so the LED will be judged inferior. Solution, get rid of all the CFLs at once.



14880 posts

Uber Geek
+1 received by user: 2791

Trusted
Subscriber

  # 1772453 29-Apr-2017 14:40
Send private message

Perhaps too risky!


22257 posts

Uber Geek
+1 received by user: 4782

Trusted
Subscriber

  # 1772512 29-Apr-2017 17:12
Send private message

https://twitter.com/richms/status/858186822244941824

Those are the ones I got for a test. Defaults to orange so not getting any more tho.




Richard rich.ms



14880 posts

Uber Geek
+1 received by user: 2791

Trusted
Subscriber

  # 1772838 30-Apr-2017 14:03
Send private message

Bunnings stock a good range of 2700L Osram LED lights in a range of wattages. To me they're a good second tier brand, not like Philips or Panasonic, but fine. Apparently they're rebadged Chinese manufacturers, they don't manufacture themselves.

 

I got the 10.5W / 1060LM version, but they come in both lower and higher wattages. From memory the highest was 13W and 1400LM or so, but I didn't need quite that bright. The Osram and Bunnings websites are both pretty rubbish, otherwise I may have found them myself sooner.

 

I've fitted them, they're not quite as orange as the CFL, but they're much more orange than the Panasonic 3000K. So long as this pair work ok I'll probably use them for the living spaces, and use high power Panasonic / Philips 3000K for the kitchen area.

 

@colinuu suggested Osram, thanks for point them out :)

 

 

 

Click to see full size  Click to see full size

 

 


 
 
 
 


14954 posts

Uber Geek
+1 received by user: 2046


  # 1772868 30-Apr-2017 14:56
Send private message

I think they do at least two different ranges, based on price. I have Some Osram cfls which have been in for 20 years and believe they were made in Europe somewhere, but they were about 20 dollars each.



14880 posts

Uber Geek
+1 received by user: 2791

Trusted
Subscriber

  # 1772916 30-Apr-2017 16:53
Send private message

These ones were something like $12 each, not much cheaper than Philips or Panasonic who probably make all their own parts. I'll probably use these in the lounge, put brighter 3000K in the kitchen, and for now hope the CFLs in the bedrooms keep working. I have about half a dozen spare CFL so we might be using them for a while.


8338 posts

Uber Geek
+1 received by user: 4596


  # 1775509 4-May-2017 12:50
Send private message

Lighting direct have LEDLux brand 13.5W / 1521 lumen 2700k bulbs - dimmable.

 

Retail price is quite high - over $30 each.

 

I'm using some here in some feature lighting in a kitchen:

 

Colour temperature seems very good.  They seem very bright of course - as they should.  Whether they're actually 1521 lumen, I don't know, but efficiency of over 100 lumen / watt for a warm white LED seems a little too good to be true.
Dimmer performance with a cheap leading edge dimmer is poor, they do work, but flicker (unlike the recent Philips dimmable bulbs) and uneven dimming at the low end . They aren't omnidirectional - most of the light is directed downwards so depends what you're using them for.

 

Lighting Direct also sell a LEDlux branded (presumably trailing edge) dimmer insert (Clipsal fitting) for use with those branded bulbs, a fairly simple job to swap over - or they'll fit in (inexpensive) Goldair brand faceplates.  Retail about $70 for the dimmer. I'll know later on today if it works perfectly - assume it does unless I post otherwise.

 

I'll have 3 of those , so nominal 4500 lumen over a kitchen bench, which should be blindingly good work-light at max power when needed - but hence the need to have them dimmable. Kitchen dining is now open plan, so I don't want a mix of lighting colour.

 

FWIW - and slightly off-topic, my wife and I went around lighting shops in Chch the other day, dropped in at Accent Lighting, she found some small ceramic pendant lights and announced that three of those would be nice.  I checked the price tag - $1735 each. Remarkable - there are some people with a lot of money around these days.




14880 posts

Uber Geek
+1 received by user: 2791

Trusted
Subscriber

  # 1775511 4-May-2017 12:54
Send private message

Thanks @Fred99, that'd be a good option if I hadn't found Osram. Ledlux are probably a better brand, but the Osram seem fine and they're 1/3 the price.


mdf

2259 posts

Uber Geek
+1 received by user: 694

Trusted
Subscriber

  # 1775512 4-May-2017 12:58
Send private message

Fred99:

 

<snip> Retail price is quite high - over $30 each. <snip>

 

 

Pfwoah. LifX Australia is having a clearance sale at the moment. For that price, you can get smart (ish) bulbs that let you adjust the temperature and brightness!

 

It is last year's model though.




14880 posts

Uber Geek
+1 received by user: 2791

Trusted
Subscriber

  # 1775524 4-May-2017 13:20
Send private message

Last year's model of light bulb! Some of my bulbs are a decade old!


8338 posts

Uber Geek
+1 received by user: 4596


  # 1775617 4-May-2017 15:36
Send private message

Without too much haggling, price came down to under $25, which for the brightness / dimmability / colour is OK.  They certainly are bright lamps.

 

I've fitted the LEDLux dimmer. Has a small trim pot on the side which needed a bit of a tweak to get dimming perfect.  Annoying place for the trim pot, as the faceplate has to come off to access it. It's also maximum 150w load - no minimum stated.  No problem as there's only 40W on it, but if someone replaced the 3 E27 LEDs with >50w incandescents, I expect the dimmer might emit smoke.  The cheap leading edge dimmers IIRC are rated 300 watts or more.

 

I needed to do this job now, but as time goes on and LEDs get better - especially the Philips ones which so far seem to dim well with standard cheap dimmers - I'll probably replace all the existing light switches with dimmers, and "over-specify" LED lamp brightness in each existing fitting. IMO the "right amount" of light is a very subjective and mood or activity dependant thing.


6943 posts

Uber Geek
+1 received by user: 663

Trusted

  # 1775618 4-May-2017 15:41
Send private message

I've used some of these and found them to be really good so far:

 

https://www.banggood.com/search/digoo-lark.html

 

Not quite what was asked for though unfortunately.

 

 

 

 

Light Color

 

Warm White / White

 

 

 

Color Temperature

 

3000-3500k / 6000-6500k

 

 

 


1 | 2 | 3 | 4 | 5 | 6
Filter this topic showing only the reply marked as answer View this topic in a long page with up to 500 replies per page Create new topic



Twitter and LinkedIn »



Follow us to receive Twitter updates when new discussions are posted in our forums:



Follow us to receive Twitter updates when news items and blogs are posted in our frontpage:



Follow us to receive Twitter updates when tech item prices are listed in our price comparison site:





News »

Dunedin selects Telensa to deliver smart street lighting for 15,000 LEDs
Posted 18-Jul-2019 10:21


Sprint announces a connected wallet card with built-in IoT support
Posted 18-Jul-2019 08:36


Educational tool developed at Otago makes international launch
Posted 17-Jul-2019 21:57


Symantec introduces cloud access security solution
Posted 17-Jul-2019 21:48


New Zealand government unveils new digital service to make business easier
Posted 16-Jul-2019 17:35


Scientists unveil image of quantum entanglement
Posted 13-Jul-2019 06:00


Hackers to be challenged at University of Waikato
Posted 12-Jul-2019 21:34


OPPO Reno Z now available in New Zealand
Posted 12-Jul-2019 21:28


Sony introduces WF-1000XM3 wireless headphones with noise cancellation
Posted 8-Jul-2019 16:56


Xero announces new smarter tools, push into the North American market
Posted 19-Jun-2019 17:20


New report by Unisys shows New Zealanders want action by social platform companies and police to monitor social media sites
Posted 19-Jun-2019 17:09


ASB adds Google Pay option to contactless payments
Posted 19-Jun-2019 17:05


New Zealand PC Market declines on the back of high channel inventory, IDC reports
Posted 18-Jun-2019 17:35


Air New Zealand uses drones to inspect aircraft
Posted 17-Jun-2019 15:39


TCL Electronics launches its first-ever 8K TV
Posted 17-Jun-2019 15:18



Geekzone Live »

Try automatic live updates from Geekzone directly in your browser, without refreshing the page, with Geekzone Live now.


Support Geekzone »

Our community of supporters help make Geekzone possible. Click the button below to join them.

Support Geezone on PressPatron



Are you subscribed to our RSS feed? You can download the latest headlines and summaries from our stories directly to your computer or smartphone by using a feed reader.

Alternatively, you can receive a daily email with Geekzone updates.