Hi/Lo bay lights

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.

Reply to
mark
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On or around Sat, 22 Dec 2007 00:04:52 -0800 (PST), " snipped-for-privacy@ems-fife.co.uk" enlightened us thusly:

I reckon that one's a "no".

I dunno about the rest of it. Are they the sort of lights that have a glow to start with and then come to life, like the old streetlamps?

ISTR sodium type ones have 2 voltages, a low voltage for the heater and a high voltage to ignite it. I guess you could measure these with a DVM and some care. If there are volts present in the sort of amount there should be, chances are it's the bulb.

Now, does anyone know *why* they're called "high bay" and "low bay"?

Reply to
Austin Shackles

On 22 Dec, 09:21, Austin Shackles wrote

Lo and high have differently shaped reflectors to spread the light to a given area.Lobay are normally used up to about 20ft.

Reply to
mark

Lobay about 5-8m Hibay aboute8-12m ish [as above] Look on a site like Fitzgerald Lighting for specs. Discharge lams [sodium type] have internal or exyternal ignitors. Usually a triangle printed on glass envelope with a letter I or E in it to indcaye type All control gear is usually specific to lamp type, but there are some multi-fit lamps available

HTH

Reply to
grumpyat

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