How hot is MH?

[corrado]

Hi folks,

Has anyone measured the temperature of

their MH housing? How hot did it get for air-con rooms and

non a/c? My fingers tell me its less than boiling 100'C

around 80'C. Can anyone chip in?

will be having a nephews orgy this weekend. Thanks.

[lightningstrike]

i dunno exactly how hot it is. but i did accidentally spilled a few drops of water on my 150W MH casing (while the MH was on) once, the water fizzled into steam in a matter of 5 secs. better hv ur nephews not too near the tank. accident happens......

[dr evil]

The heat of the MH is @ 300-400 deg.......

[giantbicycle]

yea...ard there...i just used a wet cloth and wipe the front glass of the MH and steam is everywhere and once, i left a cloth up there after wiping , it nearly till i smell something so, becareful

[dandelion76]

I add a 4" PC fan (housed inside the casing) to blow across my 150W MH whenever it's turned on. The casing is just slighty warm (perhaps ~ 40C). Can put my hand on the casing for long long time without getting it BBQ

[corrado]

The heat of the MH is @ 300-400 deg.......

Hi all,

Are you sure its that hot?

I read melting point for aluminium is 660'C.

I just touched mine and I am certain my kettle is hotter.

We should piggyback on all these free energy source.

giantbicycle? which model?

[moron_clown]

try touching a 250w bulk...it will burn ur hair even if ur hand is like 5 cm away.

[shiraz]

400w MH is the one that is around 360 degrees... u put a wet tissue paper on the housing and when it's dry in 1 min, u see it's colour is like yellow almost brown/black..

[ZeRoC00l]

I add a 4" PC fan (housed inside the casing) to blow across my 150W MH whenever it's turned on. The casing is just slighty warm (perhaps ~ 40C). Can put my hand on the casing for long long time without getting it BBQ

Erm... you're not suppose to blow the fan directly across the bulb.

MH bulbs are suppose to burn at a certain temp for the correct spectrum. Artificially cooling the bulb will cause a spectrum shift

[corrado]

hi,

400W is sure a hot mama.

My 80'C refers to my 150W small boy.

I appreciate all the inputs. Thanks.

[dandelion76]

Erm... you're not suppose to blow the fan directly across the bulb.

MH bulbs are suppose to burn at a certain temp for the correct spectrum. Artificially cooling the bulb will cause a spectrum shift

Thanks bro for your info. I am not blowing the fan directly across the bulb though. It's housed inside the light casing and blow air across the reflector where the MH bulb is enclosed .. should be fine right?

I remember I read an article somewhere (reefkeeping or something) on MH bulb and the article said that as MH buld is operating at very high temp. (in the region of a few hundreds deg. C), blowing a fan even directly on it will not affect the temp. much and hence there shouldn't be worry about spectrum shift.

Anyone to clarify?

[mUAr_cHEe]

tot one of the DIY gurus here modded a Victron housing to accomadate a fan into the casing blowing at the bulb???

then... tot it did get alot of thumbs up???

[Dispar_Anthias]

400w MH is the one that is around 360 degrees... u put a wet tissue paper on the housing and when it's dry in 1 min, u see it's colour is like yellow almost brown/black..

No wonder my chiller having hard time to cool the tank