Ballast Questions ??

Can you use a MH 400w bulb with the ballast I will get with my 400w HPS
or do I need a switchable ballast

could run a conversion bulb

hammersmoke said:

If the ballast is set up to run 400w and the bulb is the same type, the only difference is the color chart.

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not true at all

Most will tell you Yes but you should not, I have been using 400W MH lMP in 400W hps ballast For 3+ years no problems YET!

regards,

I cant seem to find any conversion bulbs in the UK

Just found this:
http://www.ebay.co.uk/itm/POWERPLANT-400W-MH-VEGATATIVE-BULB-METAL-HALIDE-400W-POWER-PLANT-/140676459666?pt=UK_Light_Bulbs&hash=item20c0f86c92
It says this bulb can be used on HPS control gear.

ChroniKz said:

Just found this:
http://www.ebay.co.uk/itm/POWERPLANT-400W-MH-VEGATATIVE-BULB-METAL-HALIDE-400W-POWER-PLANT-/140676459666?pt=UK_Light_Bulbs&hash=item20c0f86c92
It says this bulb can be used on HPS control gear.

Click to expand...

might have to find a usa seller that ships to uk.