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- Xref: sparky sci.energy:7287 rec.bicycles.tech:3470
- Newsgroups: sci.energy,rec.bicycles.tech
- Path: sparky!uunet!think.com!paperboy.osf.org!david
- From: david@postman.gr.osf.org (David George)
- Subject: Re: Why not 120 VDC ? Why invert?
- Message-ID: <1993Jan27.102747.20972@osf.org>
- Sender: news@osf.org (USENET News System)
- Organization: OSF RI Grenoble
- References: <1993Jan23.000753.14523@michael.apple.com> <1jr751INN16a@gap.caltech.edu> <1993Jan25.234831.23494@kestrel.edu>
- Date: Wed, 27 Jan 1993 10:27:47 GMT
- Lines: 13
-
- In article <1993Jan25.234831.23494@kestrel.edu>, king@reasoning.com (Dick King) writes:
-
- |> I have seen two common ratings for 6V halogen bulbs that fit my particular
- |> [Union] lamp: 2.4 W and 4 W.
- |>
- |> The 2.4 W lamps that one buys in a bike shop have little sine waves scratched
- |> into their bases, On my 6V battery, 2.4W bulbs with tiny sine waves
- |> scratched into their bases burn out after only a few hours.
-
- Maybe it means they are rated at 6v a.c., which is about 4.2v d.c. In this
- case the bulb will be subjected to about 50% overcurrent.
-
- David.
-