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| Thread ID: 121325 | 2011-10-20 20:20:00 | Energy Saving lamps Bayonet ove 100w | Digby (677) | PC World Chat |
| Post ID | Timestamp | Content | User | ||
| 1238944 | 2011-10-22 05:16:00 | I think that is just manufacturers spin ! So you do not believe consumer mag? |
Snorkbox (15764) | ||
| 1238945 | 2011-10-22 06:48:00 | I think that is just manufacturers spin ! It's true - tons of research has been done for domestic, commercial, and industrial for energy savers/CFL's, HID, LED, etc. 20w ~ 100w, from Phillips, Hubbells, and USA lighting organizations, e.g. NEMA, IES, US Energy Department, Energy Star, etc. Though light output - Lumens and colour render is also specified in addition to watts. PDF of lighting efficiency (www.aps.com) from energy star. Been researching lighting lately, and in California, new homes have to comply (or it seems) or have standards to meet some sort of energy rating. |
kahawai chaser (3545) | ||
| 1238946 | 2011-10-22 07:05:00 | I think that is just manufacturers spin ! Well yes, considering that Wattage is not a measure of light output, that's always going to be the case. |
Alex B (15479) | ||
| 1238947 | 2011-10-22 07:41:00 | bout 3 years ago I bought a box of 5 for $10 they are still going strong. I must say the new tornado ones are better + brighter than the older ones. Also, give them a few mins to "warm up" I guess, often find after turning them on they are dim and a few mins later they are brighter | The Error Guy (14052) | ||
| 1238948 | 2011-10-22 08:04:00 | No. Consumer have there own independent testing panels. :) |
Trev (427) | ||
| 1238949 | 2011-10-22 18:37:00 | Well yes, considering that Wattage is not a measure of light output, that's always going to be the case. My point exactly. The box says Watts equivalent. Companies are always going to err on the more generous side (for them) It is lumens that is the light output. I don't care about the Watts when I am trying to read. I care about the Lumens. |
Digby (677) | ||
| 1238950 | 2011-10-23 04:54:00 | Consumer make a lot of mistakes... "...a 2000 mAh battery should last for 8 hours in a gadget needing 250 mA per hour." (Oct, p30) Regarding CFLs, I think Consumer is just repeating the standard spin in saying that 20 W CFL equates to 100 W incandescent. Under ideal conditions it might be so - just as under ideal conditions a Wifi device might give 54 Mb/s. In practice there are several inefficiencies. I think one of them is that the centre-of-light is recessed into the shade more than for incandescents. Another is that they fade with time. It is obvious in practice that you don't get 5x. I have used a lot of them since day-1 and I think 3.5x is a good assumption. People are disappointed if you assume 5x |
BBCmicro (15761) | ||
| 1238951 | 2011-10-23 05:39:00 | Consumer make a lot of mistakes... "...a 2000 mAh battery should last for 8 hours in a gadget needing 250 mA per hour." (Oct, p30) How is that wrong? 250 x 8 = 2000 so that makes sense in my opinion |
Agent_24 (57) | ||
| 1238952 | 2011-10-24 01:14:00 | "...a 2000 mAh battery should last for 8 hours in a gadget needing 250 mA per hour." (Oct, p30) How is that wrong? 250 x 8 = 2000 so that makes sense in my opinion The maths is OK, it's the 'per hour' at the end... (It's like saying PSI per square inch, megaFLOPS per second, knots per hour, cumecs per second...) |
BBCmicro (15761) | ||
| 1238953 | 2011-10-24 01:40:00 | Then wouldn't that be the problem if it was "250mAh per hour" ? | Agent_24 (57) | ||
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