- Joined
- Jun 24, 2009
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- Hartselle Alabama
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- Alabama
One of the main selling points when PC bulbs first came out was that they lasted 15-18 months. They are a bent T5. I have no clue why they aren't still popular as supplemental lights except they aren't as narrow. They will last just as long as a straight T5 bulb. Many cases 24 months. But, usually around 15 months.
Most people say to replace MH at 9 months. I uses to use them a year on SPS heavy tanks. If the older bluelines were still out, you could get 16 months out of them and they were at about 90% and the color shift was negligible.
While MH will always be the gold standard IMO, the energy and bulb costs have all but killed them.
Most people say to replace MH at 9 months. I uses to use them a year on SPS heavy tanks. If the older bluelines were still out, you could get 16 months out of them and they were at about 90% and the color shift was negligible.
While MH will always be the gold standard IMO, the energy and bulb costs have all but killed them.


