Oh, and I have a problem with my sodium bulb set up. I got a digital ballast and reflector from the same shop. When I plug in the lamp it won't turn on for a while, when it does come on it only stays on for a few seconds, then it turns off, about 60 seconds later it turns on and then a few seconds later it turns back on.

I think there's a problem with the ballast, but this could also be normal? I have no idea.When it turns off the light is very weak blue, but when it comes on fully (after going on and off about 3-4 times) the light is a very strong orange, which I think is normal.

I have no idea about these ballasts and gadgets...