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Author Topic: The long haul to efficiency  (Read 987 times)
brackwell
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« on: July 05, 2017, 04:31:50 PM »

When i moved in to this house 20+yrs ago i did not have the time for eco stuff, just mouse on the wheel.

Back then i had in one of my rooms 2x150W(2x 2250lumens)filament bulbs.   Some yrs later the rage was for cfl bulbs but the early give aways by BG etc would put you off for life.  But eventually i succumbed and bought 2x 30W Megaman CFL (2x1900 lumens) at 12 ea i think! which were in fact very comparable in every respect incl warm up but were just a little dimmer. However going from 300W to 60W !  I have always replaced the bulbs one at a time so that i had a direct comparison.

Later i decided to change the coloured round bulb lampshades which i had come to dislike with large paper ball ones which increased the light a little and to a acceptable standard.

Then along came LED but it was not until they got to 11W and 1000 lumens i thought i would give it a try but as expected it didnt quite cut it and recently it blew- long before the zillions of hours!

So this prompted me to look at the Led scene again and came across the type of bulbs where you can see the filaments in BQ.   For 12W they are rated at 1541 lumens and cost 5 ea. So fitted these and i now have brighter lights than at any time before. All lights have been 2700K colour.

And so i have gone from 300W to 24W and have brighter lights. Just amazing.

Ken
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MR GUS
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« Reply #1 on: July 05, 2017, 04:53:24 PM »

yup, I marvel at it each time I pare down some wattage via led.


longevity in bulbs is sadly corrupt short sentence marketing hyperbole, ..if we (as a species) all thought a little bit harder we'd see there were many co-dependent components to stand a chance of enabling a claimed lifespan of "fumphty-fumph" years, ..but we are silly little humans who tend not to think beyond our phones on the whole aren't we!?  bike banghead

(cos marketing depts make for more interesting yet unqualified qoutes in print than the inventors / engineers of tech). 
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brackwell
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« Reply #2 on: July 11, 2017, 09:37:35 AM »

PART 2

As i am the kind of person that does not fix it if it is not broken and certainly not if the economics dont stack up at all. Bearing in mind that my gas bill was just about 250 ,incl daily charge but no DHW as that is now 100% PV. So for me to change my pilot light gas boiler for a new one was about cutting gas consumption to save the planet and future generations as economically it will never pay.  I had though been aware that the pilot light was consuming 2.5kwh/day, 912 kwh/yr, although i had mine on for only half the yr.  The legal ventilation is allowing draughts and heat loss 24/7 even when the boiler is not running and the boiler room was the hottest room -good for clothes drying.  So at least my engineering conscience was happy.

Well i am pleased to say after one year my gas usage, but not the because of standing charge, was 55% of last yrs.  What a good result !

Next step is to change to a supplier with no standing charge.  23p/day for gas and leccy = 168/yr  Looks like Solarplicity fits the bill.

Ken
« Last Edit: July 11, 2017, 09:57:32 AM by brackwell » Logged
DaveF
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« Reply #3 on: July 11, 2017, 01:21:33 PM »

Hi Ken,

Have been looking at LED replacements for fluorescent battens for over a year now for my place of work. One UK manufacturer is offering a 1500mm LED batten that claims 7350lumen output from 65W which is a fantastic-5 year guarantee as well.

Have had one of these fitted in my office whilst leaving a 6ft fluorescent double in situ for comparison and the LED is fairly similar directly below but just doesn't spread the light out to the walls as well. Not bad considering the LED fitting is using less than half the power even before considering losses in the ballast for the traditional 'tubes'.

Regards,

DaveF
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charles
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« Reply #4 on: July 28, 2017, 04:03:35 PM »

This is an interesting image on energy saving lighting, http://www.approvedtrader.co.uk/?T=Energy%20Saving%20Light%20Bulbs#cost worth a look. I have been using energy efficient light bulbs, is just as bright and if you shop around they are actually not much more expensive nowadays.
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dan_b
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« Reply #5 on: August 21, 2017, 07:14:41 PM »

Replaced all 30 of my 50w halogens with 5W LEDs what feels like decades ago now - think I've had 3 LEDs blow and need replacing in that time, but certainly made a huge dent in my night-time electricity draw.  They're probably not even very expensive anymore are they!
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Scruff
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« Reply #6 on: August 21, 2017, 08:18:30 PM »

..if we (as a species) all thought a little bit harder we'd see there were many co-dependent components to stand a chance of enabling a claimed lifespan of "fumphty-fumph" years  


As a person who frequently repairs expired electronics, machinery and electrical goods. One of the major stumbling blocks is that manufacturers are rewarded by giving an item a finite lifespan in that we buy the next generation when they expire.
It's far easier make a product last 20 years than it is to leave this earth two weeks outtov warranty.
Thermal management is compromised hand over fist for lower profile which costs years from a device's life expectancy. Li-ion in portable devices are as standard over-charged and over-discharged to a cyclelife of 600 instead of larger cells with narrower thresholds granting 3000 at the same capacity.

The forerunner of this marketing strategy that crosses my path is a half eaten fruit company who if they had their way would rent you their sub-standard (for the cost) over-priced hardware. It's rare I open a product I can't find 3 obvious ways to improve at minimal cost. I don't blame the engineers....it's the bean counters and the customers who buy them thus voting it as acceptable behaviour.
Any company soldering serviceable items like batteries in their products and giving their electronics an operational thermal design point over 65C ought to be blacklisted imo.  fume

As a more on topic aside IKEA ledare lamps are the best bang for buck in terms of acceptable CRI (>90) and longevity that I've found after spending a pretty penny on the higher end of the market's offerings and deeming them unfit for service.

« Last Edit: August 21, 2017, 11:57:03 PM by Scruff » Logged
Scruff
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« Reply #7 on: August 24, 2017, 02:30:38 AM »



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