mobiledyn: Footcandle readings are not recommended to give information about these LED's. However, an incident-meter reading shows 16 fc at the present distance and at the present power adjustment on this setup. FYI, the same meter reads 32 fc on a cloudy, bright, no distinct shadows day. (That is one f:stop brighter...so it means these LED's are adjusted to half the brightness of a cloudy-bright day). The lesson was learned last year when the lights were too close to the plants and on full-power. The guys from Fluence used a umol meter to adjust the recommended output, producing excellent plant-growth. Only used the incident-light meter to observe the difference. Tomato plants are in the garden, now and have small fruit and nice blossoms. This is the second year for these lights, and have had no problems.
|