what cri is this bulb

Thanks for your inquiry. The CRI of this bulb is over 80. If you have anymore questions, please contact us anytime.

do they have much back light?

They don't have any back light, and they are of great quality. If you have more questions, please contact us anytime.

Can a 12v battery power the light

Dear Yeng, the device requires 120Vac input voltage, if you only have 12v battery to power the light, I think you need add a DC 12V to AC 120V inverter. Thank you!

So far i'm finding it impossible to find led replacement bulbs for my 35 watt halogen gu10 track lighting bulbs. would these work for that purpose?

Yes, they should work... but I used them to replace 50 watt halogen. So in your case, plan on them being 50% brighter

Lepro Gu10 Led Bulbs 5000k Daylight White Gu10 Bulb 50w

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Fully operational. Shipping worldwide, on schedule.Duty & taxes paid at delivery

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Description

💡 Light up your life with brilliance that pays for itself!

ECO FRIENDLY SAFE - Mercury-free, UV/IR-free design keeps your environment safe while delivering 50,000 hours of reliable, instant-on lighting.
VIVID DAYLIGHT GLOW - Experience crisp, natural 5000K daylight with an 80+ CRI that brings colors to life—perfect for art galleries and stylish homes.
PLUG PLAY SIMPLICITY - Standard GU10 twist-and-lock base ensures effortless installation in any compatible fixture—upgrade your lighting in seconds.
ENERGY SAVVY BRILLIANCE - Cut your electricity bill by over 90% with just 3W power consumption replacing 50W halogen bulbs.
WIDE ANGLE ILLUMINATION - 120° beam angle floods your space with even, flicker-free light—no harsh glare, no eye fatigue.

The LE PR16 GU10 LED Spotlight Bulbs deliver 350 lumens of daylight-white light at just 3 watts, replacing traditional 50W halogen bulbs with over 90% energy savings. Featuring a wide 120° beam angle and an 80+ CRI for true-to-life color rendering, these non-dimmable bulbs offer flicker-free, instant-on illumination ideal for residential and commercial spaces. With a standard GU10 base for easy installation and a long lifespan of 50,000 hours, they combine eco-friendly safety with high-performance lighting in a convenient 6-pack.

Specifications

ASIN	B01EWBZPD4
ASIN	B01EWBZPD4
Additional Features	Dimmable
Brand Name	Lepro
Bulb Base	GU10
Bulb Diameter	1.97 Inches
Bulb Shape Size	MR16
Color	Daylight White
Color Rendering Index	80
Color Temperature	5000 Kelvin
Connectivity Technology	Infrared
Controller Type	Push Button
Customer Reviews	4.6 4.6 out of 5 stars (12,209)
Customer reviews	4.6 4.6 out of 5 stars (12,209)
Date First Available	1 November 2016
Frequency	60
Incandescent Equivalent Wattage	50 Watts
Included Components	Pack of 6 GU10 LED Bulbs included
Is Discontinued By Manufacturer	No
Item Type Name	3W 350lm,
Item Weight	9.52 Ounces
Item model number	200068-DW-US-6
Light Color	Daylight White
Light Source Operating Life	50000 Hours
Light Source Type	LED
Light Source Wattage	4 Watts
Light Type	LED
Manufacturer	Lighting EVER
Manufacturer	Lighting EVER
Manufacturer Part Number	N200068-DW-US-6
Material Type	Glass
Model Name	50W Halogen Equivalent, 5000K Daylight White Natural Light,
Model Number	200068-DW-US-6
Number of Items	6
Package Quantity	1
Power Source	Corded Electric
Product Dimensions	5 x 5 x 5.31 cm; 269.89 g
Shape	Reflector(R)
Specific Uses For Product	Indoor use only
Specification Met	UL
Style Name	Modern
Unit Count	6 Count
Voltage	120 Volts (AC)
Wattage	4 watts

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