LED Hut

DevCoder

Are you using a trailing or leading edge dimmer?

Zandoni

krisdorey wrote: »

Are you using a trailing or leading edge dimmer?

3 of my bulbs are in a lamp which is controlled by the correct trailing edge dimmer which I also bought from Ledhut.

5 are fitted to a ceiling light which is not fitted with a dimmer at all.

The three bulbs that failed were all fitted in the undimmed ceiling light.

zax47

Zandoni wrote: »

3 of my bulbs are in a lamp which is controlled by the correct trailing edge dimmer which I also bought from Ledhut.

5 are fitted to a ceiling light which is not fitted with a dimmer at all.

The three bulbs that failed were all fitted in the undimmed ceiling light.

Ok, I'd be interested in elstimpo take on this but why are you using dimmable bulbs in a fixture with no dimmer connected?

IME the extra circuitry to allow dimming inside those bulbs is just another heat generator, extra level of complexity and another potential failure mechanism. I only fit dimmables where they're actually needed. From what I know of PWM dimming, it's not without it's "stresses" (electrically speaking).

Zandoni

zax47 wrote: »

Ok, I'd be interested in elstimpo take on this but why are you using dimmable bulbs in a fixture with no dimmer connected?

IME the extra circuitry to allow dimming inside those bulbs is just another heat generator, extra level of complexity and another potential failure mechanism. I only fit dimmables where they're actually needed. From what I know of PWM dimming, it's not without it's "stresses" (electrically speaking).

I bought dimmable so I'd have the option to fit them where I like. I didn't think this would be a problem.

I believe some companies only sell the dimmable version.

DevCoder

Zandoni wrote: »

3 of my bulbs are in a lamp which is controlled by the correct trailing edge dimmer which I also bought from Ledhut.

5 are fitted to a ceiling light which is not fitted with a dimmer at all.

The three bulbs that failed were all fitted in the undimmed ceiling light.

The way trailing/leading edge dimmers work means they influence the whole circuit not just the room the switch and lamps are in.

This is why you see some bizarre effects sometimes where you have multiple dimmers and turning one on then actually quickly power cycles another set of lamps.

So its quite possible for a trailing/leading edge dimmer to affect other lamps not controlled by a dimmer but on the same circuit.

Although I would probably be looking more at the lamp fitting itself and its connection(s) as if I read your post correctly your not experiencing this particular issue with other lamp fittings with the LED Hut lamps?

Zandoni

krisdorey wrote: »

Although I would probably be looking more at the lamp fitting itself and its connection(s) as if I read your post correctly your not experiencing this particular issue with other lamp fittings with the LED Hut lamps?

The lamps that failed are in a ceiling light which is connected to the lighting circuit. I recently had my electrics checked so I can only assume it's the poor quality bulbs from LED Hut

zax47

Zandoni wrote: »

The lamps that failed are in a ceiling light which is connected to the lighting circuit. I recently had my electrics checked so I can only assume it's the poor quality bulbs from LED Hut

Yet the faults are confined to that fitting? WADR one of us is an electrician....

Checks are valid for about 10Sec after they are completed, just like your car MOT - it's a check on the status at the time of checking only - anything could have happened between then & now. For example, we can't use screw connections where they can't easily be accessed for maintenance as screw connections can & do loosen over time with 50Hz mains passing through them. (RIP to the "junction box...)

Could be a loose neutral connection (people never pay as much attention to tightening neutrals - yet they carry the same current as the live when in use) in that fitting causing a greater current draw and annoying the much more sensitive LED bulb, or causing arcing and those spikes would certainly annoy the circuits in the bulb in such close proximity. How often are the dimmed ones run at full brightness? Swap the bulbs between the two fittings - see if they fail there.

Can we have some pics of the fittings? Are they "shed" specials from a DIY store or something decent?

I honestly believe there's something more at fault here, as my experience with the LEDHut product does not mirror yours.

Zandoni

zax47 wrote: »

Yet the faults are confined to that fitting? WADR one of us is an electrician....

Checks are valid for about 10Sec after they are completed, just like your car MOT - it's a check on the status at the time of checking only - anything could have happened between then & now. For example, we can't use screw connections where they can't easily be accessed for maintenance as screw connections can & do loosen over time with 50Hz mains passing through them. (RIP to the "junction box...)

Could be a loose neutral connection (people never pay as much attention to tightening neutrals - yet they carry the same current as the live when in use) in that fitting causing a greater current draw and annoying the much more sensitive LED bulb, or causing arcing and those spikes would certainly annoy the circuits in the bulb in such close proximity. How often are the dimmed ones run at full brightness? Swap the bulbs between the two fittings - see if they fail there.

Can we have some pics of the fittings? Are they "shed" specials from a DIY store or something decent?

I honestly believe there's something more at fault here, as my experience with the LEDHut product does not mirror yours.

Although I'm not an electrician I am very competent at DIY.

The 5 light fitting where I've 3 bulb failures was bought from B&Q and I fitted it myself. These three bulbs have failed over a 5 to 6 month period so swapping bulbs will have no obvious affect.

Most LED failures seem to come from the cheap circuitry inside and not the actual LED's

Although you have fitted many of these bulbs would it have brought to your notice if some of them had failed?

There are plenty if very bad reviews on the net and their own review sight doesn't accept negative comments. Although to LED Hut's credit they have changed their minds and they are sending me a new one.

zax47

I give up. Totally not getting my point across.

Azari

Zandoni wrote: »

Most LED failures seem to come from the cheap circuitry inside and not the actual LED's.

LED's, like compact fluorescents before them (and probably incandescent, for that matter) seem be very variable in their reliability, and price is not always an indicator.