With old fashioned filament light bulbs if you wanted a brighter light in a room you would typically have to change a 100w light bulb for a 150w light bulb. This would then give you 50% more light corresponding to an increase in lumens output from around 1400 lumens to 2100 lumens. For sure you get another 700 lumens of light but the price to pay in increased power consumption is 50 watts which is a high cost. https://www.saving-light-bulbs.co.uk/blog/if-you-are-going-for-energy-saving-light-bulbs-then-get-bright-ones/

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Saving Light Bulbs - The Energy Saving LED Specialists
Energy consumption of light output
With old fashioned lament light bulbs if you wanted a brighter light
in a room you would typically have to change a 100w light bulb for a
150w light bulb. This would then give you 50% more light
corresponding to an increase in lumens output from around 1400
lumens to 2100 lumens. For sure you get another 700 lumens of light
but the price to pay in increased power consumption is 50 watts
which is a high cost.
If you look at the same analysis with energy saving light bulbs then,
for example, you would typically start with a 20w energy saving light
bulb which would typically give out around 1200 lumens and then
move up to a 30w energy saving light bulb which would give out
typically 1900 lumens. This means that for an extra 10 watts of
electricity you are getting a massive increase in light level of 700
lumens. This is providing an increase in ef ciency of around 7 times
by moving to the energy saving light bulb.
The moral of the story with energy saving light bulbs.
LIGHT BULB GENERAL INFORMATION
IF YOU ARE GOING FOR
ENERGY SAVING LIGHT BULBS
THEN GET BRIGHT ONES!!
18TH FEBRUARY 2012 SAVING 1 COMMENT
SLB Blog  

2. In the early days of energy saving light bulbs then only low wattage
ones were available around 11-14 watts, certainly at an economical
price, but now the technology has improved dramatically so the
larger units like the 30w energy saving light bulb are not only
available but also can be acquired at a reasonable price.
So in a nutshell then do not sit around in the dark with your
antiquated 11w energy saving light bulbs that take simply ages to
reach an acceptable brightness, why not invest in some nice bright
30w energy saving light bulbs and enjoy the simple luxury of light.
The Transition with the GLS LED Bulb
The GLS LED bulb is now making strong advances to take over from
the CFL energy saving light bulb and the prices have dropped
dramatically over the last few years. The high wattage LED bulbs of
7watts and above could not be made before but technological
advancement means that the outputs are increasing every year and
the prices are still dropping. In fact not the 7w GLS LED is a great
lamp and a real contender to take over from the CFL energy saving
light bulb for good. The other bene t of the LED technology is that to
make an LED bulb dimmable only costs approximately 20 % more
whereas to make a CFL dimmable energy saving light bulb adds
around 400% to the cost of the light bulb. This means that the
dimmable LED GLS bulb is going to illuminate the homes of the future
and as the energy consumption is low then why not get bright ones
which are dimmable and then you can set them to the required level.
So the dimmable GLS LED is taking over and it is only a matter of
time.
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3. 15TH AUGUST 2012 AT 11:36 PM
Good points!
Energy saving is not the only reason for choosing lighting you
want to use, and politically pushed “replacements” and phase
outs”have been counter productive also in saving energy overall
– the LEDs should offer a better prospect, although still with
omnidirectional brightness issues
The metered saving is not the only issue in savings,
eg the usually welcome heat from incandescents, or the so-called
power factor of uorescents and to a lesser extent LEDs
(=hidden power consumption), as research referenced.
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