inspectors in colorado are notoriously underinformed, what rives said is 100% correct - inspectors don't have a clue in many cases, what they know is very limited especially about equipment.
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Philips 315w CDM Elite (CMH)
- Thread starter rives
- Start date
inspectors in colorado are notoriously underinformed, what rives said is 100% correct - inspectors don't have a clue in many cases, what they know is very limited especially about equipment.
dbkick
Member
Oh I have agreed ever since I figured it out from another forum.
This being 500+ lights I'd hate to relamp that with t12s if popped.
I suppose you could make a little back off the barely used t9s you'd be forced to pull if caught.
i figure... IF they were "caught", meaning inspectors were keen on the fact that the t9 bulbs are not rated for open use... it would be cheaper to simply add an enclosure (piece of glass) to the hood or replace with enclosed hoods than changing the bulbs out.
dbkick
Member
either way it's a bitch and gonna be costly. But they'll probably just continue on as nothing were wrong.
theLumberjack
Member
why cant they be used open? just curious?
dbkick
Member
They arent protected.
It's a issue of operating pressure within the emitter. Explosive failure is rare but sufficiently powerful in MH & particularly CMH/CDM to shatter the outer envelope if a dual envelope design is not used.
I don't know the numbers but HPS emitters operate at a much lower pressure so a single envelope is sufficient protection.
I have never experienced a failure but have been told its valiant. With a explosion getting hit with the glass is of concern could cause serious injury.
Ive experienced several bulb failures in the last few years and it scares the shit out of me!
Walking in to a bulb shattered across 2 4X8 tables tells me it was hot as fuck when it exploded...
I could only imagine an exploding bulb hitting your flesh and melting right it, cauterizing as it goes in and cant pull it out...
Have had bulbs melt into a U shape on me, or the bulbs making glass blisters..
Yesterday my last lonely HPS bulb was making weird noises at it was warming up , I was the fuck out of there!
Replacing the HPS light today with DE...
Just in Colorado?
only my experience.... can't speak on other places
i've had MH & HPS bulb "explosions" lound enough i heard it pop in the basement from the 2nd floor of a house, heard a clear "bang" accompanied with a crashing sound; took me several minutes to figure out what it was because it was in an enclosed hood
but never had a CMH blow... i figure an unprotected (open fixture) t9 bulb would be pretty dangerous tho.
I found these Mogul base 315 4200k. I might grab 1 just to compare. Anyone know if these are not the correct type?. Whats the difference between TT and ED series bulbs?. I will give 1 of these TT bulbs a try. I wont need to use the pgz18 adapter. I noticed the E39 base bulbs don't use 2 [FONT=Arial, Helvetica, sans-serif]envelopes. Is the outer [/FONT][FONT=Arial, Helvetica, sans-serif]envelope thicker on these Mogul base bulbs ?? [/FONT]
found it
ED – Elliptical Dome light bulbs
TT- TUBE
http://www.amazon.com/LED2020-Ceram...UTF8&qid=1459280282&sr=8-15&keywords=315w+cdm
found it
ED – Elliptical Dome light bulbs
TT- TUBE
http://www.amazon.com/LED2020-Ceram...UTF8&qid=1459280282&sr=8-15&keywords=315w+cdm
BongJohnSilvers
Member
How many 315s would I need for a 8'x12' room?
Another thought was to run 1 210 per plant.
Another thought was to run 1 210 per plant.
Problem with running these 315's in a larger scale operation is heat, these things put out a good amount no matter what any one says..
2500 btu's of heat is what ive seen from CMH, 4000 btu's from a HPS..
2 315's to replace a 1k HPS = 5000 btu's of heat. And some people recommend 3 315's to replace a 1k HPS...
Only two companies offering remote ballasts, that would cut down on heat a bit, and currently only 1 company offering air cooled 315's...
And only one company offering dimmable 315's. But even then, want to dim a 315 watt bulb? Not much light to dim there...
After looking at a couple grow with 315's and 630's and checking out their setup, ive decided NOT to run CMH to replace my DE's...
IMHO, running DE's with the dimming option in a larger scale grow is better them running CMH...
Or perhaps LED's...
I was lucky enough to see a 24 light 630 LEC room recently. I was asking all the questions, and one was what size AC and all that. His calculations were 2500 btu heat per bulb. I may have misheard per light, per bulb, I was high...
But reading a little bit, I see that the 630 puts out 2500 BTU NOT just a 315....
So I need to re due my numbers, let me take a bong shot first...
Ya, really cant mess with the 700 btu with ballast out the room...
As I was considering CMH to replace my DE's, the price of the Cyclops turned me off and didnt read much about them. Price still turns me way off about them. The price, THEN shipping....
For a big room though, these bad boys replace 4k in HPS and is only 1200 watts with next to no heat and I believe around $2000 a light...
https://www.icmag.com/ic/showpost.php?p=7309716&postcount=3
That's not really correct. Watts are a measure of power. In the case of lamps & ballasts, virtually all the power from the receptacle is turned into heat, one way or another. Inefficiency is expressed as convective heat & the rest is expressed as radiant heat, photons. A 1000w lamp delivers 3412 btu/hr of heat. Two 315w lamps deliver 630w or 2149 btu/hr.
http://www.onlineconversion.com/power.htm
Based on airflow in/out, and temperature difference between in/out air I figure somewhere ~800btu/unit, ballast included. Based on measurements taken running 6 C/G's in a 5x9 tent.
