DUAL ARC Vs DUAL SPEC.. Which is better ???

Hi I am still trying to determine whats better for Flowering, a DUAL ARC lamp or a DUAL SPEC lamp..

The Dual Arc has an HPS and MH in the one lamp, and the Dual spec has just the HPS part, but has a higher (than hps) spectrum with more blues in it..

In theory they should be about the same, although I am leaning towards the Dual Arc.

I am interested to hear whats people favourite, why and the advantages/disadvantages of the 2 types of lamps

Also are Dual Arcs available in 250w, 400w, as well as just 600w and 1000w ???


Best replies gain some +REP! Cheers - STELTHY

What is your view on CMH?

Honkeycorn said:

What is your view on CMH?

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Is there a difference between MH and CMH ? - STELTHY

I know this link has been put up in other threads but i had a difficult time finding it. http://advancedtechlighting.com/cmhfact3.htm Watch the first video and you should get a pretty good understanding of the differences. It will all still boil down to personal preference in the end. It might seem a little dry but he gives you a pretty good explanation of the differences and why exactly a CMH will appear brighter then an HPS as well. Have a look and i hope it works out for ya.

Hortilux good brand. I have grown Bud under PURE MH, I saw no major Diff.. maybe an OZ less in yield.. but it was frosty as fk... and bomb. so Now I use 2x 600w.. . one with a MH and one with HID right next to one another and I flip the plants every few days... I will never use 2x HID bulbs.. I enjoy 1 MH and 1 HPS too much

You might also want to reference this thread as this particular grower used a 150W CMH and had some really great results for his first grow. https://www.rollitup.org/grow-journals/430541-150w-cmh-scrog.html

And my last post to you sir is to check out this link. With a little research i found a website with some basic FAQs on lighting. Yes it is a retailers site and it might be skewed as to sell you the lights but none the less information is information right? http://www.growlightexpress.com/pages/ceramic-metal-halide-pv-c0-2.html Check it out.

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Ya, huge spectrum difference, mimics both sides..... more tric production.

I found something interesting out today !! the Eye Hortilux 430w + all other Hortilux bulbs are intended for use with Old Skool Magnetic Ballasts only !!.. as they operate on a different frequency. The Digilux bulbs above are what I am happy to settle with for now...a little expensive at just over £90.00/$145.00 (inc postage) !!! but they are designed for use with only Digital Ballasts that operate on a different freq. to Magnetic's.. and will not work on Magnetic Ballasts, ONLY on Digital Ballasts !!

It was harsh having to front that kinda cash for just one light-bulb, so I hope its as good as what people have been saying - STELTHY

stelthy said:

I found something interesting out today !! the Eye Hortilux 430w + all other Hortilux bulbs are intended for use with Old Skool Magnetic Ballasts only !!.. as they operate on a different frequency. The Digilux bulbs above are what I am happy to settle with for now...a little expensive at just over £90.00/$145.00 (inc postage) !!! but they are designed for use with only Digital Ballasts that operate on a different freq. to Magnetic's.. and will not work on Magnetic Ballasts, ONLY on Digital Ballasts !!

It was harsh having to front that kinda cash for just one light-bulb, so I hope its as good as what people have been saying - STELTHY

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[video=youtube;pele5vptVgc]http://www.youtube.com/watch?v=pele5vptVgc[/video]