diff --git a/code/modules/hydroponics/plant_genes.dm b/code/modules/hydroponics/plant_genes.dm
index b3ec36e0bb..bf8aa888cc 100644
--- a/code/modules/hydroponics/plant_genes.dm
+++ b/code/modules/hydroponics/plant_genes.dm
@@ -301,6 +301,9 @@
 	rate = 0.04
 	glow_color = "#AAD84B"
 
+/datum/plant_gene/trait/glow/shadow/glow_power(obj/item/seeds/S)
+	return -max(S.potency*(rate*0.2), 0.2)
+
 /datum/plant_gene/trait/glow/white
 	name = "White Bioluminescence"
 	glow_color = "#FFFFFF"