Anyone explain to me how to decide which part has failed in these lights. I have a lot of 400 watt lights up in the workshops.Ones bought new are metal hallide,odd used ones are son-t. When one fails to light is it likely to be the ignitor or what? When they light and go out after a while and then come on again,is it the lamp,ignitor or ballast? When a lamp fails,is it permanent or can they go off and on. Can the same ignitor be used for MH and Son lamps? Anyone know a source for ignitors,usual quote is around =A317 and as a new fitting is =A350 it`s hardly worth the bother messing about with them unless I`m sure I`m changing the correct part. OTOH,I`m a Scotsman and money saved... Mark.
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16 years ago