I started growing orchids under lights some 45 years ago. Back then T-12, cool white 40 watt fluorescent shop lights were "state of the art". You can get surprising good growth under crappy lights. But, I think white light, if it is white to the human eye, is better than just the blue & red. I remember the 1990's and early 2000's, when the red & blue LED grow lights had just "become the new thing". Growers got really poor results with them. The shop lights outperformed the then very expensive LED's. Now the technology is orders of magnitude better than it was 20 years ago. I'm really glad to see all the experimentation and variation.
One trick I used for the orchids. I always kept some Cryptanthus bivittatus hybrids, the earth star bromeliad, in the orchid collection. In bright shade, adequate for the slipper orchids, the bromeliad would blush pinkish. If the light was inadequate, the bromeliad would be mostly green and white. In high light, enough for Cattleya orchids, the bromeliad would be intense red bordering on sun-burnt. The photoresponse by the bromeliad was rapid enough that within a week I'd know if a particular location was bright enough. A botanical light meter. Just a little trick from an old fart.
There are other plants that flush color, that could be used that way. But I am familiar with and enjoy growing that one particular bromeliad. BRomeliad Cryptanthus bivittatus, its now pretty difficult to find the "pure" species. Problem with the hybrids is that they stay red, regardless whether in shade or sun. So the hybrids are not quite as useful. Find the species.