a bulb with a say 185 - 250v input voltage [smaller range] will tend to use less electric for the same light output as a say 85v- 253v input bulb
That does not seem to follow, a LED chip is a current device, and can easy have thermal runaway, so we need to use a driver, these can be a simple capacitor or a complex pulse width modulating chip. The simple devices tend to have a low voltage range, but the PWM chip can have a massive range. So a colour changing wifi controlled lamp can have 100 lumen per watt, but the simple dim-able lamp can be down to 75 lumen per watt. As the colour changing lamp has a PWM chip.
However the simple lamps do seem to last longer, although hard to say, as to date think around 3 LED bulb/tube failures, one today, and all three of the failures were short lived lamps, one a day, (although fixed) one 2 months, and one a year, both the latter used PWM chips, I would say most my lamps have lasted well, and I do go for cheap lamps. Son however has had over 50% failure rate in the kitchen, odd same kitchen where the LED replacement for fluorescent failed for me. So maybe an arcing switch?
I wish I could explain why some bulbs last years and years and others have a short life, I have wondered about spikes on supply, and if the SPD helps? With tungsten at £2 a assorted pack of 10 we did not really worry if one had a short life, at £8 a bulb for colour changing GU10 when it fails one is more bothered, and the wifi controlled light switches also have it seems a short life.
But the major problem is be it GU10, BA22d, E27, or E14 the angle of the light from the LED is not the same as the tungsten so there is no way to compare. Same applies with compact fluorescent lamps (CFL) as well. I was lucky, I got 10 LED lamps for my last house and they were not bright enough, but mothers house the rooms were smaller, so my bulbs when into mothers house, and I got larger bulbs for mine. However I still have a draw full of bulbs.
I looked at this house and the single 100 watt bulb was not really bright enough to start with, so really wanted to fit some sort of chandelier and so have three 60 watt bulbs with tungsten, or 12 watt LED, but most the chandeliers seem to use E14 (SES) and then 6 watt seems to be the limit, we found an 8 bulb chandelier but it is heavy, so also fitted plug in ceiling rose, so all wired up on the floor, then lifted up and plugged in, but we spent just shy of £200 on one room to convert to LED, and we then found some visitors hit their head on the lamps so furniture arranged so you do not naturally walk under the light, and we still have up-lighters in the room to supplement the lighting.
I realise why when we moved in all tungsten quartz halogen lights, up stairs we have put in two extra ceiling lights, and have another waiting to be fitted. And at last the rooms don't look as if lit by TocH candles.
] me please. As I said above I want warm white bright ES bulbs. Thank you.
