4ft parabolic hood bulb adjustment

[the gnome]

just got my 1st parabolic hood put together and it has the roughly 4" up and down adjustment of the bulb to widen or contract the footprint

so anyone with one of these or had one know does pushing the bulb down widen the footprint or make it smaller?

btw this isn't the para hood with a horizontal bulb fixture, the bulb is in the vertical position

 

[Puscifer]

Don't have an answer to your question but how does the light spread on the vertizontal compare with your other hoods? I'm running two XXL Magnums without glass and and seriously considering a pair of those vertizontals

 

[tocksick]

well congrats gnome on putting those hoods together! they can be a pita! ive used them and they are my favs. ive found that the furthur the bulb sticks out the bottom the bigger the footprint...not much bigger but enough to make a difference. also when the bulb is furthur up in the hood it will hold a lil more heat.

hope this helps

 

[the gnome]

well congrats gnome on putting those hoods together! they can be a pita! ive used them and they are my favs. ive found that the furthur the bulb sticks out the bottom the bigger the footprint...not much bigger but enough to make a difference. also when the bulb is furthur up in the hood it will hold a lil more heat.

hope this helps

yeah man!
a real pita to assemble, and i had company helping!

I though the further down wide open up the footprint but not sure.
can't wait to get this thing in action, another hour or so...

Don't have an answer to your question but how does the light spread on the vertizontal compare with your other hoods? I'm running two XXL Magnums without glass and and seriously considering a pair of those vertizontals

don't know about the vertizontals, never tried em
i ahve the std. para with a veritcal bulb the vertizontal has the horizontal bulb in it,
confusing name for a hood using a hortz. bulb
mine arre $46 each and the vertizontals were $146,
the adptor is $20 so if i don;'t like these i can ad the zertizontal adaptor and still save a butt load.
i think the one i have will give better light from the bulb down hanging vertically than a horizontal, just my opinion

 

[Puscifer]

My bad, I'm stoned

 

[SeaMaiden]

I put my bulbs closer to the hood itself for the wider footprint.

I use vertizontal parabolics, the hood where the bulb is situated horizontally, not sure how much difference there is the footprint/lightspread and intensity as compared to a 'regular' parabolic, though.

 

[the gnome]

ive used them and they are my favs. ive found that the furthur the bulb sticks out the bottom the bigger the footprint...not much bigger but enough to make a difference. also when the bulb is furthur up in the hood it will hold a lil more heat.
hope this helps

so lowering the bulb increases the footprint, got it!

I put my bulbs closer to the hood itself for the wider footprint.

I use vertizontal parabolics, the hood where the bulb is situated horizontally, not sure how much difference there is the footprint/lightspread and intensity as compared to a 'regular' parabolic, though.

so raising the bulb higher increases the footprint, got it!


hmmmmmmmm.... ??


lol.....ok now..... only 1 of yous can be right.

well i got it hooked up last nite and I love this thing already.
and this thing throw's down the lite, I'm satisfied with it so far
the bulb is about as hi as it can go the way i set it.

yeah sea maiden, i'm really curious which parabolic(your vertizontal/my verticle bulb) hood does the better job.
if one even does better than the other.

I got mine for my 6KW room I'm building and they were almost $100 cheaper so these were it,
plus the adaptor to make mine a horizontal hanging bulb like yours is about $20 so when the new room goes online I may get 3 and do a side by side if the bulb will fit.
thats the only thing that may hold stop me from going that route.
I'll be running a BT56 Mh bulb the entire grow probably,
about the largest bulb there is in the Mh line.

it looks like a friggin football!!

 

[urbanfog]

just grabbed one off ebay last night for my vert cmh in the veg tent. Cant wait to see the sifference

 

[the gnome]

just grabbed one off ebay last night for my vert cmh in the veg tent. Cant wait to see the sifference

I think you'll like it, i used a cooltube with a big sized 27" x 30" square reflector mounted to it and toss down a lot of lite but that 4ft parabolic was a vary noticable increase.
of course the para is bare bulb so to say and the other had to go thru glass but i love the huge footprint i'm getting with my parabolic.
if you don't have to have a sealed reflector I believe this is going to be the way to go

I keep going back to this pic of vapedg13's grow with vertbulb para hoods and a $21 Mh bulbs

 

[SeaMaiden]

I have to say that when I bought the vertizontals I didn't have a clue what the difference was. Then, when it came time to hook 'em up and I saw that fully 50% of the bulb would be facing the reflector, I got seriously pissed off. What makes most sense to me is to have the bulb hanging in such a manner so that all the light is directly hitting plants, or as much as possible, rather than being reflected.

Looking at that... makes me feel a bit more serious about cleaning my indoor spaces out and firing them up again. Plus, some fresh weed might be kinda nice. Good cure, but still fresh.

That pic is beautiful. Even down to the matching pots.

 

[the gnome]

I have to say that when I bought the vertizontals I didn't have a clue what the difference was. Then, when it came time to hook 'em up and I saw that fully 50% of the bulb would be facing the reflector, I got seriously pissed off.
That pic is beautiful. Even down to the matching pots.

thats my line of thinking also,
my take is if i wanted to spend that kind of $$ in a big hood with a horiz. bulb in it I would just pay a bit more and get a XXXL magnum or raptor that has multiple usage capabilities

but again, after looking at the vertizontal and the verticle bulb para's when deciding what
i wanted to get i was still leaning towards the vert bulb para as being better because the bulb is in the vert. position
and i think you will get more direct light from the bulb 360deg. around it and below it
on top of the loads of reflected light from the hood itself
especially using a BT56 Mh, it actually sticks out of the reflector a fair amount so hence more direct light.

but on your vertizontal, thought i read where you could mount the bulb either way?


that pic is pretty inspiring.. eh
50 plants 5oz per plant
and they are in 6qt pots

 

[SeaMaiden]

How inexpensively did you get the parabolics? I paid just around $100 for the one I paid for, the other was free.

I think I can mount the bulb vertically, but I have to get another socket or something like that, I honestly can't remember without going and looking at the paperwork again. The tip of the bulb doesn't put out as much light also, IIRC. Some mitigation of light loss, but I can't qualify how much.

 

[the gnome]

How inexpensively did you get the parabolics? I paid just around $100 for the one I paid for, the other was free.

I think I can mount the bulb vertically, but I have to get another socket or something like that, I honestly can't remember without going and looking at the paperwork again. The tip of the bulb doesn't put out as much light also, IIRC. Some mitigation of light loss, but I can't qualify how much.

I paid $45.48 for a 4ft hood
then i had to get a5Kv socket assembly, about $2

i read again on yours, and it has a vert. adjustment for the bulb, not a vert mounting option.

 

[vapedg13]

just got my 1st parabolic hood put together and it has the roughly 4" up and down adjustment of the bulb to widen or contract the footprint

so anyone with one of these or had one know does pushing the bulb down widen the footprint or make it smaller?

I always slide it so it half way

We used both styles of the parabolic vert and hor....I believe that a 360 bulb delivers more light than a 180 bulb and the top reflected back

 

[the gnome]

I always slide it so it half way

We used both styles of the parabolic vert and hor....I believe that a 360 bulb delivers more light than a 180 bulb and the top reflected back

hey vaped,
so, 1/2 ways on the adjustment then... got it
glad to see someone thats tried both style of para's
and yeah, me too on the direct lite..
that huge ass BT56 bulb is so big it sticks out from under my hood enough to give a decent 360degree circle of direct lite.
direct lite beats out reflected lite for sure


have you done enough side x side with the 2 styles of hoods to see a definite difference, in yield/growth?

another thing thats been running thru my head...
the more I think about direct lite, those cone style reflectors seem like they would be very effective at giving direct lite,
and still not waste anything from the top of the bulb,
almost like a bare bulb setup
but no waste at all from the bulbs top end

 

[the gnome]

I always slide it so it half way

We used both styles of the parabolic vert and hor....I believe that a 360 bulb delivers more light than a 180 bulb and the top reflected back

hey vaped,
glad to see someone thats tried both style of para's
and yeah, me too on the direct lite..
that huge ass BT56 bulb is so big it sticks out from under my hood enough to give a decent 360degree circle of direct lite.
direct lite beats out reflected lite for sure

have you done enough side x side with the 2 styles of hoods to see a definite difference, in yield/growth?
the more I think about the direct lite, those cone style reflectors seem like they would be very effective as direct lite goes, and still not waste anything from the top of the bulb,
almost like a bare bulb setup
but no waste at all from the bulbs top end