SON T Plus Tubular External Ignitor 250w

I recently got a SON-T Plus External Ignitor 250 watt HPS lamp. My question is:

I have been using a Vialox Nav-T (Son-T) lamp on a 250w maxibright ballast. Will the new son-t plus work on the old maxibright ballast or do I need something else to use it. What is an external ignitor?

bump.........

Ok, after some extensive searching & reading I have found the following:

Lamps which need external ignitors have got a triangle with E printed on them. Light which have got an internal ignitor has got a triangle with an I printed on it it.

My existing Osram SON-T lamp has got a triangle with a E printed on it, so the new SON-T Plus lamp should work with the ballast. Also maxibright ballast are actually made by Layrton, a Spanish company, and they have build in ignitors.

Cant wait to see the effect of the new lamp on my girls. It says that the 250 watt SON-T Plus lamp produces 20% more light than the standard 250 watt SON-T lamp used in most systems. I wish I had read this sooner!