Constant Brightness Usage Hours

Light source life span

The estimated life span of the light source varies depending on the Brightness Level setting and whether the Constant Brightness setting is on or off.

Constant Brightness off

1	Brightness level
2	Time before the brightness of the light source is reduced by half (approximate)

Brightness Level setting	Hours
100%	20000 hours
90%	21000 hours
80%	24000 hours
70%	30000 hours

Constant Brightness on

1	Brightness level
2	Time the projector can maintain constant brightness (approximate)

PowerLite L400U/L610/L610U/L610W/L615U

Brightness Level setting	Hours
85%	6000 hours
80%	10000 hours
75%	14000 hours
70%	19000 hours

PowerLite L500W/L510U

Brightness Level setting	Hours
85%	17000 hours
80%	19000 hours
75%	22000 hours
70%	24000 hours

Note: The light source usage hours vary depending upon environmental conditions and usage. The hours listed here are an approximate and are not guaranteed. After 20000 hours of use, you may need to replace parts in the projector. If Constant Brightness is turned on, and you have exceeded the usage hours listed here, you may not be able to select a high Brightness Level setting.