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Re: [APD] Ballast electronic or magnetic?
A few random thoughts:
Given that they do what other ballasts do so what unless they be less expensive. If they are more energy efficient there would be some savings there over the long term but only on the ballast energy consumption. I can't see any other virtues -- e.g., I haven't found coil-less solid state devices of any kind to be generally more reliable or less prone to failure than circuits containing coils.
I am curious about the sweeping claim that it will light dead bulbs. What does it mean to say it works on a dead bulb? One with a broken filament? One with a gas leak? One with too little mercury left to vaporise? One that's broken in half or that has bad pins? I guess the better question is, "What are the necessary and sufficient bulb conditions for it to light a bulb?"
Keep us posted.
sh
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----- Original Message ----
From: Richard J. Sexton <richard at aquaria_net>
To: aquatic plants digest <aquatic-plants at actwin_com>
Sent: Friday, December 1, 2006 2:01:06 AM
Subject: Re: [APD] Ballast electronic or magnetic?
>Surely, there are ways to create ballasts without the use of coils,
employing more complicated starter circuits, but such designs are not nearly
so elegant or cost effective as the basic inverter and coil design.
There's a local inventor that's made a solid state ballast that gets the
same amount of light, as measured by my Zeiss light meter, at half the
power. it even works on "dead" tubes and as of this week HID lamps. He's
doing the patent thing and has promised me samples for long term evaluation
"soon". He's been here a couple of times with them. They seem to do as
he says, and will indeed strike and light dead tubes.
More as I find out.
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