Good day all. Following on reading this I investigated what could be found in my area of Victoria Canada. Home depot had a color selectable led light with a red setting. I find this to be way to bright in my grow tent darkroom. I found a FEIT 4.5 watt red led light bulb at Lowes. It has the advantage of being dimmable. I also found a Lowes an extension cord equipped with a led dimming switch. Together I am able to go from off to barely on and then steplessly to full on. In a reflector housing this gives me all the light versatility I need. I corresponded with FEIT electric and requested a spectral emission data for this bulb. I reproduce this below. I have also added the spectral sensitivity for the Fuji X-ray film I use as well as that for Ilford ortho film for comparison purposes.
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