14th August, 3.20pm 21 degrees C, in my own garden;
| location | light intensity in lux |
|---|---|
| dining room, 2m from french windows that face east, doors open | 360 |
| same location but with me between the sensor and door, casting shade, doors open | 79 |
| almost same location but now sitting 1m from open door | 3000 |
| sitting on the step of the french windows, sensor facing up | 8000 |
| same location, sensor facing down | 2000 |
| out in the garden, sensor facing up, 70% thin cloud | 20000 |
| same, but with a piece of paper held 15cm above to shade sensor | 9300 |
| under the pear tree | 5000 |
| in greenhouse | 7200 |
| under a pumpkin leaf 2m from greenhouse | 2000 |
| next to the pumpkin leaf | 11600 |
14th August, 22.30, In dining room, with curtains shut.
| location | light intensity in lux |
|---|---|
| Sitting at computer. Brightness measured at my eyes, pointing to computer. Brightness turned up | 35 |
| As above, but brightness turned down | 29 |
15th August, 18.55
| location | light intensity in lux |
|---|---|
| In garden, blue sky but in shade of the house | 1900 |
| Sitting at the computer | 178 |
Brightest sun
| location | light intensity in lux | Date | Time |
|---|---|---|---|
| Direct sunlight, blue sky | 54500 | 16th August | 16.27 |
| Direct sunlight, blue sky | 54500 | 25th August | 12.50 |
| Direct sunlight, very thin barely-cloud | 54600 | 26th August | 13.05 |
Sun through the day
| location | light intensity in lux | Date | Time |
|---|---|---|---|
| 100% light cloud, outside french windows | 750 | 26th August | 07.00 |
| 100% light cloud, outside french windows | 12700 | 26th August | 09.30 |
| Direct sunlight, half way to bench | 54600 | 26th August | 13.05 |
| 100% light cloud, at bench | 3600 | 26th August | 19.00 |
A full day of blue sky
| location | light intensity in lux | Date | Time |
|---|---|---|---|
| Blue sky, bench | 100 | 27th August | 06.00 |
| Blue sky, bench | 2700 | 27th August | 07.00 |
| Blue sky, bench, sun coming up over trees | 8000 | 27th August | 08.00 |
| 100% medium cloud, bench, sun coming up over trees | 20000 | 27th August | 10.00 |
| Blue sky, bench | 54600 | 27th August | 11.37 |
| Blue sky, bench | 54600 | 27th August | 13.04 |
| Blue sky, bench | 54600 | 27th August | 14.13 |
| Blue sky, bench | 54600 | 27th August | 17.14 |
| Blue sky, front garden | 54600 | 27th August | 18.03 |
| Blue sky, front garden, sun going down behind garages | 23400 | 27th August | 18.54 |
(All of the 54600 measurements are actually 54612. It's weirdly consistent.)
| location | light intensity in lux | Date |
|---|---|---|
| Blue sky, direct sun | 54612 | 30th August |
| Blue sky, direct sun, filtered through conservatory roof | 54612 | 30th August |
Catriona and I both wonder why we keep getting 54612. Maybe the sensor is maxing out. It's meant to go up to 100,000.