high pressure sodium lights

[gav188]

i have recently bought a 250 watt hps light with the reflector and ballast and im wondering if i can put a 400 watt hps bulb in with this set up , without it blowing up

[BillyNoMates]

Have you any information from the ballast and lamp casing ?

Such as manufacturer and type ?

[gav188]

its a fitzgerald ,and the product number is bb250son/250 , and it also says e40 son-t hps

[BillyNoMates]

Must admit I've not come across them before. From digging around their website this was the closest I could find ;

http://www.flg.co.uk/09_floodlighting_items/9_ 03_sceptre3.htm

Unfortunately, although it looks as if this will take up a 400w lamp, there's no definite answer.

Sorry not to be able to help more.

[gav188]

ok pal , thanks for trying for me

[lembo121]

You can grow some nice plants under those, as if you didnt know!!
lol

[FelixtheDog]

I bet I know what you are up to gav188...& good luck!

[woodchopper]

from my experience - putting a 250w hps lamp in a 150w unit only made the lamp burn the same brightness as a 150w - there isn't enough power in the ballast to light it at full intensity - therefore I would assumt that putting a 400w lamp into a 250w unit would just burn the lamp out.

[BillyNoMates]

My concern was over possible heating issues - if say the ballast couldn't drive the lamp or if the casing wasn't designed to take the additional heat output.

Just a couple of things to consider.

[chinois]

I think the ballast has to match the wattage of the bulb, or at least be higher. So you need to swap your one for a 650w ballast or buy a separate 400w capable one.

On second thoughts i assume you should have separate ballasts for each bulb. Your bulbs are different sizes so sending the same current to each bulb doesnt sound right.
Good luck with the growing