Metal halide-Penetration

[Jason McK]

Originally Posted by kwirky

sanjay's lighting info gives the geisseman 13k mega marine a par of 92 on an HQI ballast. the XM DE gets 60. That beats out a 250W 13k like the aquaconnect (62 par on an 250W hqi ballast).

When my bulb needs to be changed I'm switching to the geisseman mega marine. I had one before in a DIY HQI light and it was frickin' bright.

Very good point Sean. It is more the combo if Ballast and bulb that will give you the light out put or PAR. It's important to know that some bulbs just won't perform well with a particular bulb. the example above is a great one

J