would it be dangerous to have 2 hps bulbs side by side 2 inchs apart?

same as above...

More then likely yes.

It wouldnt be dangerous but why would you need then 2 inchs apart? Depending on the grow style and wattage
theres no need even for 150w hps more like 6inchs

I like to keep my HPS 2 millimeters apart

If your trying to save space you will bebetter off just using a bigger light ( 600 - 1000).

Will be a waste of light if put right next to each other

Hydrofarm makes a dual lamp hood called Grozilla and the lamps are about 4 inches apart.

Why..just curious..

a bit like squeezing the headlights on a car together in to the centre of the car like a motorcycle what benefit would that have except for maybe if you wanted to follow the white line on the road on a very dark night lol.
you would have to do that because you would not see the side of the fucking road as you should.

it is a waste if you ever have a lamp lighting and heating another bulb, better to focus that energy on the canopy. also you will have to replace the bulbs more often and increase the risk of a fiery explosion

i like to keep mine touching with only a wet rag between them, try that

StrangerDanger said:

i like to keep mine touching with only a wet rag between them, try that

Click to expand...

you really are a dangerous stranger.......