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Seadog
Save the planet. It's the only one with rum!
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rtcosic
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There's your answer.
You want an LED giving >2000 lumens and preferably 3500 - 4000K, not that horrible yellow 2700K 'warm white'.
Onoff
In the land of the unfinished project I am King!
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Lower the number the better for me!! My eyes struggle to really see in colour at the 5000k plus end of the spectrum - daylight?! It's more like bright moonlight.
I never thought I would ever be confused by a bloody light bulb, maybe I asked the question wrong in the first place, although @voipio did appear to understand me.
The old fasioned 150w light bulb used to be about right for our living room so I was wanting to find out what wattage of low energy or led bulb I need to get to match the light output from the old fasioned 150w bulb.
Maybe it would be wise to get one of these thousand k bulbs and fit a dimmer switch, I don't know, grateful for advice please.
Hi,
You asked the right question/s but with the introduction of LEDs, greater choice got a little more in-depth.
In years past with 40w 60w 100w, 150w GLS, ES, SES, B22, lamps us codgers were all brought up on, we knew the light to expect, simple and 150w GLS are still available as @Seadog found.
The only thing to be wary of then, ( and still is )was the habit using higher wattage GLS lamps in fittings designed for 60w, it's why so many discoloured or disintegrated and required replacing.
The equivalent to your 150w GLS in LED is 25w thereabouts.
( note, you can happily and safely fit/use a 150w GLS LED equivalent in a 60w fitting, if it fits ).
Kelvin and Lumen are different measurements but can affect each other.
A general rule of thumb is the lower the K the warmer, cosier, dare I say dimmer the light but as a perception it doesn't work for everyone.
Yours is in a overhead lounge setting, don't know if lamp has a shade around it, this may affect any LED equivalent perception wise as well as spread.
In a overhead lounge surrounding , while subjective, I would say the clearer an LED lamp, the better and more atheistically pleasing it would look and a better spread of light.
I looked for a 150w GLS LED clear globe lamp equivalent, (25w, B22/ bayonet fitting ), couldn't find one, I did find several 25w LED equivalents white/frosted type but not nearly as good a light as the clear type I think, ( and yours may have a shade ).
I might add, subjectively, it's where uplighters or table lamps come into their own.
Also, I don't have any GLS lamp fittings in my property, all LEDs, one of the first things I changed.
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rtcosic
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You cannot use Watts - power input - to compare light bulbs.
You need to compare Lumens - light output.
Different brands of LEDs output different light output for the same power input due to differing efficiency.
Old incandescent light bulbs output about the same Lumens for the same Watts as the different brands are all using the same technology of the same (in) efficiency.
The colour temperature is measured in Kelvin.
As you have seen different people like different temperatures.
2700K is about what an old incandescent outputs.
2300K is light candles or hurricane lamps.
I like c.4000K as it is closer to daylight so the colour rendition of the object you are viewing is closer to daylight. That makes it easier to read books/magazines/newspapers and do close work where contrast is important.
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gaz1
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we had 2 of them one in the lounge lamp and one for above the oven
whilst my mum was older i tried a few bulbs until i got the right ones
100w led bulb was too low due to lumens so i tried the 100w 1530 lumen led bulb and it was bright
bright enough for both the lounge lamp and the kitchen
Heat dissipation starts to become an issue for the higher powered LED bulbs. The 1521 Lumen (why so precise a figure??) (~100W GLS equivalent) bulbs can get quite hot in the section where the driver electronics are located, and are thus at risk of a reduced lifespan. Having said that, the 1521 Lumen bulbs in our household have been reliable so far. There, that's jinxed it.
As far as dimming goes, not all LED bulbs are equal and, unless they're specified as dimmable, they probably won't play nicely with thyristor/triac-based dimmers. Even the use of a variac tends to produce less than desirable dimming.
As far as dimming goes, not all LED bulbs are equal and, unless they're specified as dimmable, they probably won't play nicely with thyristor/triac-based dimmers. Even the use of a variac tends to produce less than desirable dimming.
But in years gone, most consumers did just that, they knew the light a 40,60,100w GLS would give.
People would purchase not by asking I need a lamp that outputs so many lumens they would just ask for a 40,60,100w lamp, that's how lamps were compared.
Technically you are correct on lumens, much more so with LEDs.
But I honestly as a kid running to the hardware store for a bog standard GLS lamp ever remember kelvin or lumens measurements being mentioned on the box, just wattage, that's how we compared and bought.
In many respects, its how consumers still want to buy I think, give us a 3,5,7 and so on wattage LED, unfortunately for consumers it's no longer so simple.
LEDs are great and great energy savers, last a lot longer to or should, choice is great but can be convoluted.
gaz1
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i can show you what i bought read carefully as both are 100watt
this one below i found in a b22 fitting
note the watts and also note the lumens
i wouldnt buy devolta again didnt last 6 months whilst the linx lasted 2 years
this one below i found in a b22 fitting
note the watts and also note the lumens
i wouldnt buy devolta again didnt last 6 months whilst the linx lasted 2 years
Yea, that is why I asked on here, because I didn't know about Ks or lumins. I thought probably a 20 watt would be about right for replacing the old 150w but it would be a mistake to buy if I was wrong and this is a great place to get answers for that kinda question. Thanks all.
