[OVT]

As far as I know they are all HO. You can tell by checking the wattage, ie, 36" are 39w.

v3

 

[jrman83]

I think so too. Was not very happy with those bulbs and how long they lasted. They do well, just not for long it seems.

 

[The Trigger]

I think so too. Was not very happy with those bulbs and how long they lasted. They do well, just not for long it seems.

Hmm that's strange. Did they blow out? Mine have been going for a year and a half and my plants still grow like weeds

 

[Aquarist_Fist]

Thanks so much, guys!

I've been pretty happy with mine as well. I am replacing mine after over two years. I should have done it earlier of course - colors and output aren't ideal anymore - but they did well for a pretty long time.

 

[jrman83]

I had mine a little over a year (5000k) and noticed plant growth seemed to slow. Decided to change my bulbs out and my plants took off. The previous bulbs before them lasted over two years.

 

[OVT]

I had 2 duds so far. One burned out within 5 mins and I just found one that is barely dim after 6 months.

v3