The perfect 2' 40W ballast solution

Topics relating to lighting control gear, including magnetic & high frequency ballast and ancilliary devices such as starters, ignitors and switchgear.
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SuperSix
Posts: 660
Joined: Wed Jan 05, 2011 7:01 pm
Favourite Manufacturer: Fitzgerald
Area of interest: Fluorescent and Mercury Discharge Lighting
Oldest item: BTH 200W Carbon Filament Lamp
Location: Cambridgeshire
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The perfect 2' 40W ballast solution

Postby SuperSix » Thu Jul 14, 2011 6:58 pm

I've found a cool running solution to run 2' 40W tubes! Kev's not gonna like this one but I've found that a 6' 70W HF ballast is perfect! One of the advantages of HF ballasts is the current supplied to the lamps stays constant regardless of the lamp voltage so a 70W ballast is pretty much perfect for a 2' 40W. The current is a bit lower than a proper 2' 40W ballast but the increase in efficacy compensates somewhat and has no negative effects on the cathodes.

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Danny
Posts: 829
Joined: Thu Apr 21, 2011 10:24 pm
Favourite Manufacturer: GEC
Area of interest: Street lights fluorescent discharge
Oldest item: 120v 60w carbon lamp 1905
Location: North east england

Re: The perfect 2' 40W ballast solution

Postby Danny » Thu Jul 28, 2011 10:39 pm

Hmmmmmm I might try this...

What about those THORN HF Ballasts we bought off Ebay for the T8 36W and T12 40W? should I try that


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