Originally Posted by DunMunro
Chris Eberle measured the native black on an HT5550 as .1736 nits. Smarteco was .0809 nits, so the lamp dimmed to ~47% of normal output. Regardless of which figure for lamp life is correct, it should considerably exceed lamp life in normal (high) lamp mode, and at the same time it should exhibit less dimming over time.
A black floor that's 53% lower does not necessarily mean the lamp is at 47% power. Even if this was the case it does not mean that the lamp has a proportional longer life to the amount of power the lamp consumes.
On my W2000/HT3050 SmartEco claims
Using Economic mode reduces system noise and power consumption by 30%.
Using SmartEco mode reduces system noise and lamp power consumption by up to 70%.
If the Economic or SmartEco mode is selected, the light output will be reduced and result in darker projected pictures.
But with a watt meter the consumption goes down by 30% on Eco, but also by 30% on SmartEco with a black projected image.
That's verifiable false.
it does not mean that the lamp has a proportional longer life to the amount of power the lamp consumes.
Total (equivalent) lamp hour = 2.0 x (hours used in Normal mode) + 1.4 x (hours used in Economic mode) + 1.0 x (hours used in SmartEco mode)
The 1.0x seems like an estimate since content can vary in brightness.
But how can the lamp consume 70% at the lowest in SmartEco and Benq claim that it consumes as low as 30%? Something doesn't add up.
For the HT5550 manual it seems to imply that SmartEco and Eco will last 60% more than Normal. I think this is more of a guesswork than accurate estimates.