General > General Technical Chat
UK to attempt to ban the sale of halogen bulbs.
Gyro:
--- Quote from: NiHaoMike on June 11, 2021, 12:31:59 am ---
--- Quote from: coppice on June 10, 2021, 08:56:13 pm ---Lamps in modern ovens seem to fail quite quickly, even when you use the right bulbs. They used to last 10 years or more. I think they are moving the bulbs further into the oven and cooking them more. Even so, most ovens are still poorly lit.
--- End quote ---
Add a diode in series with the bulb and use a higher wattage bulb to compensate.
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But unfortunately may disable 'AC' spec RCDs (can't remember the US term for the moment GFCI) which may have poor DC imbalance tolerance due to current transformer saturation.
james_s:
The interesting thing about that graph is just how drastically life decreases with only a modest increase in operating voltage. At just 1.05 times rated voltage the lifespan is cut to *half*. That's 126V over here in 120V land, not completely unheard of, one place I lived for a while was a bit lively, typically 124-125V. I was pretty much all CFL by the time I lived there though but that should have made incandescent lamp life substantially shorter.
SilverSolder:
--- Quote from: Nauris on June 11, 2021, 04:53:18 pm ---[...] at 25% brightness power consumption is 50% but lifetime increases 300-fold
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That makes sense - this house has a ceiling full of recessed incandescent lamps that are always dimmed. I can't recall the last time I had to change one of those bulbs... elsewhere in the house, LED, CFL, etc., are not able to keep up with the "old tech" in terms of reliability!
themadhippy:
--- Quote ---The interesting thing about that graph is just how drastically life decreases with only a modest increase in operating voltage
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Especially noticeable here in the uk when using lamp stock meant for the 230v european market,yea were all supposed to be harmonized at 230V,but when your voltage is sitting at 250v(within spec) the 300 hour lamp life becomes noticeable shorter.
One major downside of leds is they dont fade to black like an incandescent,even the best dimmers ive seen still snap off at some point instead of a nice gentle fade.
TheBay:
The supply here is 245-250V+, as most products are designed now for the "harmonised" voltage standard, bulbs and heater elements (such as ovens, showers and kettles) don't last as long as they should. Also some capacitors in SMPSU's are right on their limit for a 230V rated supply and do not cope very well with the UK voltage.
I remember when products (usually with linear transformers) had a 220/230 and 240V setting.
My lutron system will fade incandescent/halogen bulbs down so low they are barely visible, it is a fantastic system but it does not play nicely with some LED's and none will dim as low as traditional bulbs.
--- Quote from: themadhippy on June 12, 2021, 12:25:56 am ---
--- Quote ---The interesting thing about that graph is just how drastically life decreases with only a modest increase in operating voltage
--- End quote ---
Especially noticeable here in the uk when using lamp stock meant for the 230v european market,yea were all supposed to be harmonized at 230V,but when your voltage is sitting at 250v(within spec) the 300 hour lamp life becomes noticeable shorter.
One major downside of leds is they dont fade to black like an incandescent,even the best dimmers ive seen still snap off at some point instead of a nice gentle fade.
--- End quote ---
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