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Flicker index readings for four experimental LED bulbs at 20 gallilux and 5 gallilux as measured by a light meter (SFIM-300, Everfine, Hangzhou, China; Hato Lighting Galli-Luxmeter, Hato Lighting, Netherlands) at duck head height.
| Flicker index |
||
|---|---|---|
| Treatment | 20 Gallilux | 5 Gallilux |
| Blue | 0.120 | 0.000 |
| Green | 0.066 | 0.035 |
| Red | 0.142 | 0.171 |
| White | 0.120 | 0.000 |
