Why 2 modes. I bet if you took tail cap milliamperage readings, did the math, your tune would quickly change. Once consciousness arises in you, you will become much more discerning about exact allowance of milliamps per day or night needs. One or two modes don't cut it.
All warms are, is a filter over a cold led. The filter is sometimes needed for human eye, may not see balance of color, due to blue scatter. So, in sunlight, noon cct is very high, driving glasses are, if not too dark, (maybe pinkish violet tint) will help a painter see color better outside. However, yellowish warm may hurt color perception when painting inside. I was trying to use warm just last night to floss and Polish out a root stain along my lower tooth line, had to bring in cold led to see. My next round of led house lights are going to be cooler, I hate warm, no matter how much they sap the energy out of me, allowing me to fall asleep quicker. 4k is warmest I can barely tolerate. 5800, probably coolest. Though I won't admit publicly, I may like some of my 6500k lights.... CRI, GAI, and luminance equals color perception. Cct is huge for preference. For example, my 4200 K 65 cri probe start my 400watt hid, is preferred by me, over my 500 watt 70 cri 6500. However, on my eye "subtle color shade difference perception" testing, the higher focused, ugly tint led was slightly better. But man, I hate the color of that led light.
I do a ton of professional painting, and 120 shades of color tests, color matches. So, color shade difference and runtime is everything. I want to like the warms, but 12 years of constant buying leds, testing, I cannot. The depth of field argument, where the eye needs some blue, higher luminance to see better, far far far better matches my long road of experience. But make no mistake there have been horrible cool Xmls that I immediately threw away. Then give me an 80k lumen, even 407, 65 cri, over my Tota at 100 cri & 24k lumen, any day for painting. For photography, I would always use the 100cri warm, esp. for Lilly white people, at least.
I guess in principle, a person has the right to prefer the color of high pressure sodium, as well as p.o. purple. The real question to ask one's self is why. So warm, is ingrained habit for older people, it is fatiguing in morning while soothing in evening. Warm makes pale people look better by rendering blue veins and eye bags poorly, emphasizing red blood vessels. Warm may show autumn leaves better. Higher cri photographs better. Warm was argued to offer resolution in eye, but I haven't seen this effect, likely because my cool light have reds, per my spectrometer. While cooler, not too cold, offers better eye depth perception, has narrow frequency needed to replace caffeine intake. Most people prefer neutral. Though my kids prefer the cooler neutral, closer to sunlight cct. I prefer whatever give most eye perception per available amp I can reasonably allot. Whatever eliminates the most ghosts or skips.
People have favorite colors. So, at times, may wish to see only certain colors. I wonder when tunable flashlights and headlamps with high Lpw, will be a reality.... Also, I don't want one or two smartphone controlled tunable bulbs in my house-ever!!! I don't want the security backdoor, headaches. Unless, I am the one doing the spying of realtime usage habits. I don't like the price. I don't appreciate stupidity, demonstrated through a complex solution to a simple knob control. Give me a $2 to $4 knob or touch control, any day, so I can buy 30 of them.
Now I'd rather have multiple lights than multiple modes. To me single mode is best for most uses, and two is the most I will tolerate. If a light has two modes they must be accessed via "uncoupled binary controls" to use Elzetta's terminology. The switch must do one thing and no more: It must activate the light. Mode switching must be done via some other means such as tailcap or bezel rotation. Theoretically a sliding switch or external ring would work but in the real world this would just introduce another point of failure and added risk of water ingress.
