Is the uv/purple option actually uv (usually 395 nm)? will it cause fluorescent objects to glow? i need to use it for that purpose

"UV/Purple" is a wavelength of about 395-400nm. This wavelength will cause a faint somewhat dim "glow" in florescent objects, BUT it will have a visible purple light emitting from the diode. This is because at 395nm more of the light emitted is VERY near the wavelength of regular purple light so you will get both lights (weak UV & regular purple) emitting from the LED. This LED emits more purple light than the useful UV you've after. It will work, but you will need quite a few focused at a single point to be of any real use for you. Also UV at the wavelength in my opinion is somewhat useless unless there are 20+ of them and you dont mind purple light flooding the area) . This type of UV is referred to as "Blacklight-Blue" because this UV source is a mix of invisible (black light) but near the blue light spectrum causing the purple. Then there is "Blacklight-Black" Yep, this is like florescent Halloween lights that don't appear to be bright at all but things REALLY GLOW. What you need is an LED with a wavelength of about 350-365nm. These do not emit much visible purple light but emit the INVISIBLE UV light that causes the glow you want, in fact at this shorter wavelength the UV light really causes a MUCH brighter and intense fluorescent glow, and without all the purple light flooding it. Most people tend to think they are junk and/or not working (due to the short wavelength UV light being invisible and not knowing that). They are more expensive but you get what you pay for. That's why some UV flashlights are very inexpensive (under $5) and others are pricey ( $50+) being of equivalent size but not even comparable in performance. Forensic UV light are this type (with few exceptions)

So i ordered 2 bags of 100 white LEDs, why did 1 bag have 70 and the other had 69?

People can,t count.I had a order that was suppose to be 100pcs and only received about 40. Email the vendor.I emiled and received a full order

what do i need to use to power these led diodes?

LEDs have a forward voltage drop for the color your using. I think white is around 2.5+ volts or so. If you plug one into a 12 volt supply by itself it will burn up. You can Google led resistor and use the calculator to find the resistor based on input voltage. Most LEDs can't take more than 20 milliamps.

Brand	Novelty Place
Light Type	LED
Special Feature	Bright
Bulb Shape Size	T6 1/2
Bulb Base	E26
Incandescent Equivalent Wattage	1000 Watts
Specific Uses For Product	DIY Science Project Electronics Components Lighting Kit
Light Color	White
Voltage	3 Volts
Unit Count	100.0 Count
Color Temperature	9000 Kelvin
Number of Items	1
Brightness	12000 Lumen
Shape	Round
Material	Diodes
Indoor/Outdoor Usage	Indoor
Power Source	Integrated Power Source
Color Rendering Index	80
Beam Angle	30 Degrees
Power Consumption	0.06 Watts
Item Package Quantity	1
Light Source Type	LED
Specification Met	Energy Star
Item Weight	0.1 Ounces
Light Source Wattage	0.06 Watts
Product Dimensions	0.5"W x 5"H
Bulb Diameter	0.5 Inches
Control Method	App
Average Life	3 Years
White Brightness	14000 Lumens
Efficiency	High Efficiency
Manufacturer	Novelty Place
Color	Clear White
Light Output Maximum	12000 Lumens
Part Number	A.LED.Diodes.100Pc
Item Weight	0.1 ounces
Item model number	White Light
Is Discontinued By Manufacturer	No
Size	100 Count (Pack of 1)
Finish	Clear
Sound Level	44 Decibels
Special Features	Bright
Batteries Included?	No
Batteries Required?	No
Warranty Description	3 month.

Novelty Place 100pcs 5mm White LED Diode Lights - Super Bright Clear Transparent DC 3V 20mA Light Emitting Diode LED Bulbs - DIY Science Project Electronic Components Lighting Kit (White Light)

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