Greenhouse shade advice needed.

[K-Sci]

Is 20% shade (light diffusing glass) enough at this time of year with peak ambient greenhouse interior temperatures in the low 90Fs and gentle air movement. I'm thinking of removing my 40% shade cloth, which in combination with the 20% light reduction of the light-diffusing glass puts the current shading combined at 48% of full sun. Is a 48% to 80% change likely to cause leaves to burn?



-Keith