Green Building Bible, Fourth Edition |
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Posted By: djhI don't like downlights,
Posted By: Dominic CooneyCan you just replace your tubes with LED tubes? They usually come with an LED starter to replace the Flourescent Starter in the fitting. I have done this with a couple in the house when they failed, actually the ones that are under the kitchen wall units (they were already there). Changed them to daylight colour too!I don't think T5 LED tubes are available? There's no starter in T5 (or T4) units - they use electronic ballasts. I think I could replace the units with roughly equivalent T8 LED-tube units but if I'm replacing the units I might as well consider other possibilities.
Posted By: revorWhat is it about downlight you don't like.Partly it's just what I consider to be a messy look with lots of lights everywhere. There's the lots of holes too, with possible consequences for acoustic and fire insulation. No airtightness worries because it's the ground floor ceiling thankfully. In our case now it would also be quite a lot of hassle to get power to all the downlights. But that's just my opinion, yours is obviously different :)
Posted By: WillInAberdeenWe stuck selfadhesive LED tape to the underside of all the high-level kitchen cupboards, which is great for task lighting.
If we did it again we'd use RGB LED tape so we could change the colour temperature at different times of day (warm white while eating, cool white in the daytime, flashing disco colours only when the kids are allowed to access the programmer!). It would also work stuck on the tops of the cupboards bouncing off the ceiling, might add several runs to get enough lumens.
The LED tape in the kitchen has been faultless but another batch elsewhere in the house has some failed 'pixels' - both batches off ebay.
Posted By: Simon StillPersonally I think the only place RGB lighting has a place is the garden.... You can buy 'dual white' LED tape which has two different colours of white LED on it and you can light either circuit. white colour temp from RGB tape is never that accurate and if theres anywhere you can see it or see it reflected you can pick out the diffent colour leds which is why there is also RGBW tape which has a separate white LED used when you want white rather than trying to blend the RGBI agree about the RGB. Back in the day I used to have lots of coloured lights for parties but those days and lights are long gone! Though there are the Xmas tree lights :)
re bulbs vs fittings. Natural inclination is always to go for replaceable 'bulbs' BUT my experience has been that good quality LED fittings really do have a very long life, whereas I've had to replace numerous LED bulbs over the years (especially GU10's) regardless of the brand/quality. I'm sure the issue is overheating - either of the LEDs or the driver which has to be miniturised and packed into a 'bad' space in a bulb.When I bought the fittings for our house I decided on LED GU10s as representing a reasonably safe path forward. I bought a load of lamps and tested them principally for the light quality - a surprising number had blue and yellow regions visible in the output. I chose Crompton as the apparent best and bought 50. That was in 2015 and none have failed yet. Most are in open fittings, because I was worried about heat as a life-shortening factor too, but the 'wet' rooms got the IP44 enclosed units I mentioned. A few places got (T5 or CFL) fluorescents and I've had to replace those tubes a few times but they're getting more difficult to buy. edit to add: I just bought some more of the same GU10s at a very reasonable price so I'm happy with my decision.
Also suspect that drivers are less reliable than the LED chips themselves in most cases so finings where they are separate would likely have a longer life. And even if LEDs do fail in a fitting you *can* replace them - I found some bargain high quality Edison screw bulb garden lights and modified them to run sections of LED tape instead of a bulb.That's interesting to know. I don't have any failures to confirm it unfortunately :) You've set me wondering about removing the innards of the T5 fittings and putting some LED tape inside and drivers either inside the units or in the ceiling above. You can just see a blanking plate between the two lights near the window in my photo - those are where the wiring is terminated.
Ikea's LED light strips and panels are well worth looking at - the larger panels give a really nice diffuse light (eg https://www.ikea.com/gb/en/p/floalt-led-light-panel-dimmable-white-spectrum-40436316/). Though the 'last chance to buy' on some of the fittings suggests they're just about to launch a new range.Thanks, that's an idea I'll definitely look at. :)
You can use all their drivers/wireless smart home stuff/switches etc but none of the electronics are in the lights themselves and they're all just running 24v (better than 12v if you want remotely located drivers) so you just cut off the plug on the trailing cable and connect to whatever driver you want to use.
Posted By: LFDJH - how is your lighting going ? I am not convinced LED as much better at Lumens /Watt or that directional nature of LED (WinA) gives better light from doing some rough trials. I am going to stay traditional !Yes, that was why we originally went fluorescent. T5 tubes had better lumens/watt than the LEDs then and are still better than a lot of LEDs now. Plus the tubes gives a distributed light source with less shadows. I understand the directional nature of LEDs but the reflector mounts in the fittings do help somewhat with the tubes.
Posted By: WillInAberdeen4 off lamps at 3350 lm each, is 13400 lm - I think that's more lighting than the entire ground floor of our house!Workshops and garages can need quite bright lighting at times. And it can be difficult to say exactly where the light is going to be needed. Trailing inspection lamps around is not always convenient.
I found the lumen ratings quoted on listings on Amazon/eBay etc are usually lies. Have to buy a few different lamps and try them out to find the bright ones, or go with big name brands.Yes, and not just the lumens. The CRI of some LEDs is absolutely appalling. So I generally go for either Sylvania (mostly for fluorescent) or Crompton (mostly for LEDs). The reliability also seems to be pretty good, as well as the specs being true. Not one Crompton has failed in over seven years to date.
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