150HQI vs 175 Mogul

[Funky_Fish14]

I was going to say something about the PAR and shielding... but fkshiu got it already.

Mogul halides will usually beat double-ended bulbs because doulbe ended bulbs MUST have a shield for UV, while mogul-based bulbs do not. Though HQI's usually are brighter/stronger, that shield will almost always cause the bulb to fall in the poop-hole compared to an identical mogul-based bulb.

This is all if your talking about the PAR - which should be a big part of what matters in choosing the bulb for coral response.

Cheers,

Chris