this is a great sport to get into - yes it also will chew up the cash alittle bit getting started but it is unreal what you see and the feeling after a dive is great - i have been diving for over 15 years - was an assistant instructor for 5 of those and had more fun on outings than you can imagine. Caution - if you get started and see our colours in cold water it will spark the interest to start a cold water tank = this equals more money.
(no metal halides required though)
Cheers
Rich