Talk:Fluorescent Lighting

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Efficiency Section:




I'm quite interested in CFL; but have yet to understand how they might look in a standard halogen downlighter; even if that is possible - anyone know?

-- (anonymous)

The place to ask is on the newsgroup - discussion pages here are really about development of the article. Besides you'll get a lot more responses on the group.

--John Stumbles 01:58, 22 February 2007 (GMT)


Not sure if someone just made a cockup or actually wanted to nuke the page. The IP address in question checks out as what looks like Oman telecom. Their abuse contact is:

inetnum: -

netname:        OMAN-EXPN-2003 
descr:          PROVIDER 
country:        OM 
remarks:              FOR SPAM & NET ABUSE 
person:         Ali Abduwani 
address:        P.O.Box 789 address: Ruwi 112 OM 
phone:          968 631881 
fax-no:         968 695482 

Not sent anything yet, but can wait and see if anything else happens.

--John Rumm 02:37, 1 July 2007 (BST)

A1, A2, A3 ballasts

For electronic ballasts, there's A3, A2, and A1, but it's more complicated how they're used, and I haven't looked up the precise details. I think A3 only allows a total of about 1W more than the tube power rating, and A2 and A1 have total power consumptions less than the tube rating. This works by underruning the tubes, and relying on the HF operation being more efficient to get the same light output as at 50Hz operation. Would need to look into that some more before it's accurate enough for the wiki though.

Andrew Gabriel NT 21:38, 19 September 2010 (BST)

work in later

Andrew Gabriel wrote:

> T5 means Tubular, 5/8th inch diameter. > (Similarlay, T4 are 4/8th inch diameter.) > > Original T5 tubes (which go back to the 1950's) are 4W, 6W, 8W, 13W > (6", 9", 12", 21" respectively). They are not efficient, but continued > to find uses where designers needed a thin light source or low power > with longer life than a filament lamp. > > 20 years ago, a new set of T5 tubes were introduced in Europe to > enable luminares to be better designed by using a smaller > light source than the T8 tubes. These start at 14W and go up to 80W. > The tubes have metric lengths which are all multiples of 300mm minus > a fixed 37mm (for lampholders), to enable them to be used with modular > kitchen units, modular ceiling lights, etc, which tend to all be > multiples of 300mm in Europe. They are also used in the US now, > although the logic of the choice of lengths is lost on them, and they > quote the lengths to the nearest foot;-) There are two* power ratings > in each size, a lower power higher efficiency tube, and a higher > output but lower efficiency tube. For example, the shortest tube is > just under 600mm, and is available as 14W or 24W. > These new T5 tubes are only supported with electrconic ballasts. > *Largest size has three different power ratings for historic reasons.

Energy efficiency?

The article at present starts : "Fluorescent lighting is the most energy efficient lighting suited to widespread domestic use." I doubt whether that is still true. And, in general, such statements need to be dated in the text, e.g. as "use (1984)." John Stockton (talk) 22:35, 7 February 2017 (UTC)

Yup LED lamps are comparable in some cases. A quick calculation that output figures of around 90 lm/W are possible with both. --John Rumm (talk) 23:10, 8 February 2017 (UTC)