yes you need a ballast that is what gives the light power. You can buy it all in a set online. its not like you just get a lamp and pit a 400w hps blub in it, you need a fixture for it (reflector) and a ballast, some come with a cord others you have to buy sepretly
yes you need a ballast that is what gives the light power. You can buy it all in a set online. its not like you just get a lamp and pit a 400w hps blub in it, you need a fixture for it (reflector) and a ballast, some come with a cord others you have to buy sepretly