HID question

[MidnightCowboy]

anybody know if the wattages between diffrennt manufacturers are comparable.

ie. is a 50w GF twice the brightness of a 21w salvo?? from the opinions on here it appears not? am I missing something?

[gibbon]

Originally Posted by MidnightCowboy

anybody know if the wattages between diffrennt manufacturers are comparable.

ie. is a 50w GF twice the brightness of a 21w salvo?? from the opinions on here it appears not? am I missing something?

GF have a magical scale all of their own, dont get me wrong I like GF lamps but their power ratings for lamps do not relate to the amount of energy they consume from the battery or emit in the form of light...

[BJ]

As I said recently on another thread, wattage, equivalent wattage, lumens at the source - they can all be misleading. Line up two lights and shine them on a white surface. That way you can see which is brightest, which has the widest or nicest beam and so on.

[wreckweasel]

Light output is measurable as a power and a colour temp. Those are the parameters that actually matter, not the manufacturers 'marketing' with wattage claims.

The whiteness of HID is alternately hated/loved depending on which faction you're crusading for (is this why divers are always talking about 'ponies'?). It does become important however if you're getting into video/photography, see; Color temperature - Wikipedia, the free encyclopedia.

Other things to watch out for;

• light stability (flickeryness). Varying perceived importance.
• light robustness. The brightstars have the edge over the WA here.

/Z

[deepestandy]

Lets put it this way... If a GF 100W HID was proportionally as bright as a 21W Salvo/Brightstar that would be almost five times brifhter and that would be one extremely brigt torch! I'm not so sure it is though

Andy

[BJ]

Here are two beam examples from a recent Diver comparison test. The lamps were comparable. Which do you prefer?

[deepestandy]

I would be interested to see wich torches theses were, and the distance the lamps were from the surface they were shon at???

Andy

[BJ]

Divernet | Group tests | Dive Torch Survey - Results

divernet has an archive of all previous Diver mag articles.

[BJ]

Magic double post! Taking advantage of it, go to Divernet - Diver Magazine Online and much more | Diving | Dive Shows | Gear Tests | Travel | News for the front end of these tests.

You might like to look at: Divernet | Group tests | Strike a light - the lights

[Ferg3333]

Its usually that 21w HID is 100w equivalent . But different lights give differening results from my experience the best lights out there are the salvos and sarteks buts that my opinion. I dont like the fami hid, and the greenforce never quite cut it with me.