Hi,

I know little about electronics so this migth seem very easy for some of you but I would apreciate if you can explain me in non specialised language. I have to connect this lamp: Philips, TL-D 18W/108 Black light blue to a 12V battery. Which transformer do I need to place inbetween it and how to connect it? Where can I find such a transformer which is robust enough for outdoor (wet) conditions (Provider that ships to Belize)? How can I calculate the number of hours the lamp will ligth?

 

Do you have anything more than the bulb? You will need at least an inverter and a ballast transformer. I can't tell from the data sheet if you need a starter, but it's a modern product and I'm guessing you do not.

The bulb will draw about 1.5A to operate at 18W from 12V. So, that's 1.5A•hr for every hour of operation. Check your battery rating, and divide it by 1.5 to estimate the longest possible run time. You'll want to be careful not to discharge your battery too far, as this will shorten its life.

 

So I need an inverter and ballast, any idea about a type or requirements for these elements? And how to connect al these things together.

Arno

 

So I need an inverter and ballast, any idea about a type or requirements for these elements? And how to connect al these things together.

Arno

Not sure whether any hobby suppliers sell bare board 12V florescent inverters, but you can easily get 12V fittings for camping/caravan use and modify it to suit your tube.

Another possibility is a universal car accessory lamp, usually includes a flashlight, a flashing beacon and a strip light - you'd probably need to go for the type that runs from the accessory socket rather than the fully portable dry battery type.