I also use the Agrosun bulbs. I usually don't get around to changing them
yearly but that would be a good schedule. Definitely don't go two years.
The last time I changed them (at around 18 months?) one of the new bulbs was
bad and I had to leave the old bulb in one fixture for another week. It was
very apparent which fixture had the old bulb, there was a huge difference in
the amount of light.
-danny

"Bryan" wrote in message
news:c6uxe.1851015$Xk.482418@pd7tw3no...
Thanks Steve:

From the descripton it sounds identical to the Sunmaster bulb. Probably
all made by the same mgf and relabelled. How often do you change out your
bulbs.



"Steve" wrote in message
...
Bryan wrote:
Can anyone recommend a suitable 400 watt MH bulb for growing and
blooming orchids. I was thinkung of the Sunmaster 400 watt neutral
deluxe. Apparently a well balanced bulb.


I've had real good luck with my 400 W Agrosun bulb. There is also an
Agrosun Gold bulb. I'm not sure what the difference is and I didn't find
the answer to that with a quick search on Google.
A little info on the original Agrosun he
http://www.bghydro.com/BGH/itemdesc.asp?iC=HLRBMH04AS
Information but not the best price. I've seen them cheaper elsewhere.

Steve