ttystikk
Well-Known Member
The fastest way to prematurely wear out HID lamps is to underdrive them. This is especially true of your MH lamp. You can shorten its life by 90% by running it at 50% of its rated power. No bullshit- my info is straight from Philips white papers on the subject.Hard to say since I added my filter and fan shortly after putting in the HPS, but for the little time I had it running with no fan the HPS did run a few degrees warmer. With no fan pushing out the hot air I had to keep both bulbs at 50% or temps would be 93+. Now with fan running HPS is running 600W or 100% at night and holding around 83-81.
I do wish I'd seen this thread before you went out and bought that 600W setup. I'd have sold you mine! LOL Seriously, craigslist is your best friend in Colorado.
Google Philips 860W CDM lamps. The lamp costs the same as other HID options, but it runs on an old school thousand watt magnetic ballast set to MH... and it runs at 860W on it.
I've tossed all my MH lighting outright and my HPS in flower in favor of this lamp. Keep in mind it needs to run in the vertical position only. Since its such a fantastic lamp for vertical grows, you might consider the approach.