Anyone with LED ceiling lights experience - Page 1
Forum section: electronics / general

author: Lotus
author_rank: Contributor
timestamp: October 19, 2015, 10:58:36 am
content: I am considering getting some ceiling LED lights from dx, do anyone have knowledge about LED such as those, and how long they will last before they will lose brightness, color etc?They are square shaped, its than any help....

author: MikeW
author_rank: Regular Contributor
timestamp: October 19, 2015, 11:02:52 am
content: Lifetime will depend on the LED itself and how hard it's being driven.Many drivers feature CLO (constant light output) which will slowly increase the current over thousands of hours to compensate for this effect. The exact curve can be set by programming the driver, normally over DALI, but Philips can use a simpleset RFID system. It varies by manufacturer.As for colour degradation I'm not really too sure about that.

author: VK5RC
author_rank: Unknown
timestamp: October 19, 2015, 11:08:36 am
content: I recently upgraded from halogen to LED MR16 down lights. I bought some "Chinese" LED bulbs as a trial but they had pretty poor colour mix (almost a purple colour), ended up buying Phillips , found a good price locally, but haven't had to replace any of the 40 or so I have put in. Had to ring the bank beforehand though!!!!eghttp://www.simply-leds.com.au/new-philips-master-led-mr16-7w-3000w.html?gclid=Cj0KEQjwqZKxBRDBkNmLt9DejNgBEiQAq8XWPq94qiB9gZCpX_UqmMqtB_hHr8_ic8wdU3YkQS34ZvoaAokn8P8HAQ

author: coppice
author_rank: Super Contributor
timestamp: October 19, 2015, 11:28:09 am
content: Quote from: Lotus on October 19, 2015, 10:58:36 amThere are a lot of these diffuse LED lighting panels in the lighting shops in China. Colour quality varies, but there are some pretty good ones. They don't seem to get very warm, even when running in the shop all day. They have plenty of area to spread the heat, so I guess that's not hard to achieve. Some of these panels are reasonably thick, but others are very thin. I didn't look at the kind of power supplies they use to achieve that level on thinness.

author: rollatorwieltje
author_rank: Unknown
timestamp: October 19, 2015, 11:37:36 am
content: Quote from: VK5RC on October 19, 2015, 11:08:36 amI use those Philips as well, colors are good. Equivalent to halogen. Just consider that these things are passively cooled, they need some breathing space.They do seem to work fine on electronic transformers, which is nice if you already have one of those in your ceiling. Not all LED replacement bulbs are compatible with those things (not strange considering they actually provide about 30v p-p).

author: rjeberhardt
author_rank: Regular Contributor
timestamp: October 19, 2015, 12:36:27 pm
content: Replace the downlighters in the living room with "Warm white" Chinese LED spots about a year ago. Not quite as bright as the 50 W spots they replaced but O.K. They don't seem to have deteriorated after a year's use and they have already paid for themselves in energy cost savings.Russell.

author: tautech
author_rank: Super Contributor
timestamp: October 19, 2015, 05:13:22 pm
content: We put LED's in, replacing Halogens hoping to dive them with less transformers (SMPS) and as they only drew 45mA thought we could drive 10 from 1 transformer. Fail.The old SMPS had to be replaced with LED friendly units and now we have 3 units driving 18 LED's.

author: Fat
author_rank: Regular Contributor
timestamp: October 20, 2015, 02:52:37 pm
content: We changed out about 100 of them in the can lights here. What a buy. Can't recall the manufacturer, but they were $25 each with a $20 rebate so we paid $5 for each of them. After installing them our power bill dropped by $100 a month. For me it worked out well. The ones I got are brighter than the incandescents they replaced and I've not had to change one yet.

author: SeanB
author_rank: Super Contributor
timestamp: October 20, 2015, 06:47:08 pm
content: Best transformer for them is the good old potted transformer, wound with steel laminations and copper. Gives a true 12VAC for the lamps, and a 100VA unit will do a lot of lamps, around 20, not the 2 it would with 50W halogens.