Battery floodlight.

[Frank E]

I used to use a battery powered floodlight at work (for investigations in burned out premises) which comprised a sealed lead acid battery (Yuasa) and fibreglass case, electronic ballast/inverter and a 4pin compact fluorescents.
It was similar to:

http://www.nightsearcher.co.uk/PROD...View/PropertyID/8/language/en-GB/Default.aspx

but with only one lamp. It lasted a full 8hr shift. (until it broke and the manufacturer tried to charge a fortune for a replacement part)

Thinking of putting together a similar unit and would like to make it the brighest most efficient I can, but admittedly I'm not up on current LED specs. Might I get more mileage and luminance out of LED?

 

[Lynx_Arc]

I think folks will need more information, your budget limits, output minimum/maximums also. LEDs can be more efficient but when output reaches beyond a certain amount you have to start using multiple LEDs and underdrive them for more efficiency which means even if an LED can put out 300 lumens or 600 lumens maximum it won't be any more efficient than fluorescent and can cost even more so. If you underdrive the 300 lumen LED to perhaps 200 lumens it gets more efficient but then you need another LED to make up for the less light. So in effect there will be a tradeoff between brightness/efficiency/cost using LEDs vs fluorescent. My advice is to look for a more robust CFL light using common easily obtained parts in it (ballasts/tubes) so replacement costs are very cheap.