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- Xref: sparky sci.electronics:22127 rec.aquaria:9860
- Path: sparky!uunet!news.tek.com!gvgpsa!gvgspd.gvg.tek.com!gvgdsd!pjs
- From: pjs@gvgdsd.GVG.TEK.COM (Peter J. Stonard)
- Newsgroups: sci.electronics,rec.aquaria
- Subject: Re: High Efficiency Fluorescent Lighting
- Message-ID: <1ifghoINNhm5@gvgspd.gvg.tek.com>
- Date: 6 Jan 93 20:47:52 GMT
- References: <1993Jan4.225724.29960@panix.com> <1993Jan5.055326.2966@klic.rain.com> <1993Jan6.022928.22542@ee.ubc.ca>
- Organization: Grass Valley Group, Grass Valley, CA
- Lines: 59
- NNTP-Posting-Host: gvgdsd.gvg.tek.com
-
- In article <1993Jan6.022928.22542@ee.ubc.ca>
- jmorriso@ee.ubc.ca (John Paul Morrison) writes:
- >In article <1993Jan5.055326.2966@klic.rain.com
- > keithl@klic.rain.com (Keith Lofstrom) writes:
- >
- >
- >[ high frequency flourescents ]
- Great post about Keith's experience of replacing office
- lights with electronic ballasts.
-
- >How much are the high-frequency ballasts, power conversion
- >(60 Hz to whatever kHz)?
- >
- >And most of important, where do you get them? I strongly suspect the local
- >lighting hardware guys are going to say 'duuuuuhhh?' when I ask for this.
-
- I have been researching this recently. In the aquarium hobby we
- sometimes get interested in fluorescent lighting and there has been a
- recent thread or two in the *.aquaria groups.
-
- I saw replacement ballasts at Lumberjack and Home Depot, two large
- home improvement places. They had both the core-coil (inductor ballast-
- transformer) and the equivalent electronic type. The electronic
- type are about twice the cost at $48US for 2 x 40W 4ft size. (In
- Keith's original post he said $36, I think).
-
- According to one manufacturer the electronic ballasts operate at
- 24kHz, and drive the lamps at 92% of the light produced by 60Hz
- operation. The higher frequency reduces the flicker and gives an
- 'apparent' increase in brightness. The colour temperature is not
- changed. This contributes to the improvement in efficiency of the
- electronic types over the core-coil ballast-transformers.
-
- For a 2 x 40W fixture the core-coil system draws 96W at 0.92 PF,
- or 16W of heating in the ballast.
-
- The electronic ballast driving 2 x 40W bulbs draws 72W at 0.98 PF.
- A savings of 16% is claimed for the electronic ballast, which implies
- that each lamp consumes about 30W but I haven't confirmed this yet.
-
- In each case these are standard lamps. There are HO and VHO
- lamps too, which are not compatible with these ballasts. Their
- operating current is:
-
- STD (standard) 0.430A
- HO (high output) 0.800A
- VHO (very high output) 1.500A
-
- I've cross posted this to rec.aquaria so that we may share this
- and any new information. Please edit out rec.aquaria if your
- follow ups don't apply.
-
- ++=++=++=++=++=++=++=++=++=++=++=++=++=++=++=++=++=++=++=++=++=++
- Peter J. Stonard + /^\ /^\
- Grass Valley Group + /^\ / \/
- Grass Valley, CA. 95945 + / \ / /
- pjs@gvgspd.gvg.tek.com + Fish keeper in the Sierra Foothills
- ++=++=++=++=++=++=++=++=++=++=++=++=++=++=++=++=++=++=++=++=++=++
- If it looks like; sounds like; quacks like; an Opinion. It's mine.
-