LED bulbs

I don’t think the boss would be overly keen on the aesthetics of flat panels in the lounge. In fact I wouldn’t either!

I find with LED lamps that if the lamp hangs down from the fitting, it lasts longer than if the fitting is upwards as in a table lamp. Maybe something to do with what heat is generated

Roy

If so then there would be a void above the back of the panel as additional cooling. How are they used if set against a plasterboard ceiling? Attached directly or some sort of enclosure?

The 300 x x1200 Led panel I have in the kitchen was bought with a surface mount frame - 4 off 50 mm deep aluminium extrusions that screw together to make a frame that is attached to the ceiling. The panel slides into this & there is enough room to sit the driver module in the space between panel & ceiling.

Similar to this one on Ebay

Nigel B.

Edited By Frances IoM on 25/03/2022 14:25:20

Don't know what that means but binning them and getting on with life works for me.

I value what's left of my life highly and do not squander it on fighting to get my money back after 2 years.

Presumably, the claimed life of 25,000 hours is based on switch on once and continuous use.

Unless my maths is adrift, this equates to 2.86 years continuous use.

Despite numerous start ups, most of ours have survived for longer than that.

The two on the mill, and the one over the fitting vice, get switched on and off quite frequently, but are only used for relatively short periods.

And filament lamps used to quote a 1,000 hour life, shortened by the current surge when switched on each time.

I extended the life of the halogen lamp on the lathe, considerably, by improving the ventilation of the housing.

Howard

My wife wanted a bright white light for the home office. Amazon had some 24W fluorescent spiral lamps so I bought a pack. Quite compact for the output and a nice bright cool white. From previous experience they should outlast any of the LED’s I’ve bought recently. Only downside is they do take a few minutes to reach full brightness but it’s a non issue for us in this application.

FIVE!!

If I had confidence that was going to remain I would be running for a gas boiler and loose any ambition I had for electric heating, (heat pump of otherwise.)

My strategy that carbon energy will become expensive relative to wind power is proving true, unfortunately the way we are charged reflects an inflated market rate due to lack of gas. So daft.

Presumably, the claimed life of 25,000 hours is based on switch on once and continuous use.

No - it is the anticipated period of operation to reach 70 (or 50) % of the original light output in lumens, apparently.

The packaging should give an indication of the deterioration percentage used for the claim with "L70" or L50".

CFLs were similarly rated.

I have ended up changing the high bay workshop lights at work after a couple of years use while they were still functional, but when the light output dropped to "too dim to be useful". This applies equally to CFL or Led units, but the CFLs work out cheaper to change & the wattage isn't much lower for the Leds to save the extra upfront cost.

Nigel B.