Dale Hodgins wrote:Thanks Len. I understood some of what you're telling me. So the voltage used by Christmas lights is determined by the number of little bulbs. They are so cheap right after Christmas. I could see mounting a long skinny mirror near the ceiling, so that light is all projected where needed. Any idea on whether it would be more efficient to use fewer more powerful bulbs rather than dozens of little ones ?
Something like that. They dim fine with the right dimmer. They do not work with the dutycycle dimmers that are most common. This is because they already use a short duty cycle and because the dimmer drops even higher peaks on the line so that the LED may get brighter rather than dimmer (same with many CFLs... plug your drill in close by and watch the lamps get brighter when you run it).
So, am I correct in assuming that these lights could be tailored to be used with any voltage of battery, just by finding out the voltage of each bulb and using the right number to add up to that voltage ? I can add and count ! This could be really easy if the answer is yes. Also, is it better to slightly under power or slightly over power. I've heard that they don't dim well. I found strings that use only 6 watts. This should mean that when cut into thirds, each string would draw 2 watts. Cut one into six and the battery from my 18 volt drill could work to power a little camping structure.
The 40 volt Ryobi batteries are rated at 4 amp hours. If I'm drawing 20 watts continuously, how long will it be good for ? I could easily do it from KWH but am not familiar with amp hours. I want to know how much energy is stored when fully charged.
Dale Hodgins wrote:
Am I correct in assuming that it would do no harm to under power a string ? I could start with a few too many and then prune it back one at a time until optimum performance is achieved.
Dead lap tops --- I often see free computers that are given away when non battery issues kill them. These are a nice sized battery for the camping structures that might use 50 watt hours in an evening. Those little batteries that power kid's ride on toys are nice as well.