Automan: I don't know how you would make a call from your side of the pond so I'll try to remember to call them today and get back to you with their answer. But now, if you're talking about HPS that's a different story all together. The reason I've stayed with florescent lighting over the years is that I like to keep it simple. Let's look at your options.
HID is hands down the best you're likely to see most of the commercial growers using, but there's a lot of heat involved so you have to have sufficient ventilation or you'll cook your plants. HID is a pretty sophisticated set up with external ballasts and it's pretty expensive to get into and operate.
I have a friend who has a HPS set up and it's still not simple enough for me, but he claims it's better than florescent lighting, especially for flowering. You're still talking about a set up I would refer to as, 'having to have deep pockets,' to afford. And it's more complicated than I want to get into for a personal grow.
Next you have florescent lighting and the curly-cue compact lamps with the internal ballasts are very popular. I use one in an aluminum reflector to keep my mother plant and her babies happy in a little cloning tent. The only complaint I have with how some of my friends are using them is that in most cases their grow room looks like a snake pit and it has become a wire man's nightmare with cords running all over the place. But they're pretty inexpensive to set up and operate. And when the bulbs wear out and need to be changed you're not talking about $100 to $200 to replace them as you do with HID and HPS lighting.
You might want to read SeeMoreBud's book, "MARIJUANA BUDS FOR LESS GROW 8 OZ. OF BUD FOR LESS THAN $100." It's a great how to source and if you follow his instructions you'll have a neat clean operation without likely risking burning down your house.
My present fetish, and what I started using last year, is T-5 florescent lighting. It's simple, compact, inexpensive and on a little personal grow it works great. It will do all you want but only under the immediate area of the fixture, beyond it the light dissipates too fast without reflectors or some kind of side lighting. They operate very cool so you can keep them close to your plants without worrying about burning them. Fortunately my state is very reasonable and it allows me to veg twelve plants and flower six. I don't even notice the energy cost on my electric bill but my buds aren't as tight and pretty as my friend's buds that are grown under HID or HPS. But mine smoke just as well. And this is all at a fraction of their operating costs. You might want to look into it. I hope this helps. HSA